<h2 dir="auto">Steps to Reproduce</h2>
<div class="highlight highlight-source-dart notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="import 'dart:async';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';
import './Screens/home.dart';



Future query() async {
  DocumentSnapshot result = await Firestore.instance.collection('dummydocs').document(&quot;doc1&quot;).get();
  print(&quot;RESULT: &quot; + result.data.toString());
}

void main() {
  query();
  runApp(new MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      home: new Home(title:&quot;Nothing Special&quot;),
    );
  }
}"><pre class="notranslate"><span class="pl-k">import</span> <span class="pl-s">'dart:async'</span>;
<span class="pl-k">import</span> <span class="pl-s">'package:cloud_firestore/cloud_firestore.dart'</span>;
<span class="pl-k">import</span> <span class="pl-s">'package:flutter/material.dart'</span>;
<span class="pl-k">import</span> <span class="pl-s">'./Screens/home.dart'</span>;



<span class="pl-c1">Future</span> <span class="pl-en">query</span>() <span class="pl-k">async</span> {
  <span class="pl-c1">DocumentSnapshot</span> result <span class="pl-k">=</span> <span class="pl-k">await</span> <span class="pl-c1">Firestore</span>.instance.<span class="pl-en">collection</span>(<span class="pl-s">'dummydocs'</span>).<span class="pl-en">document</span>(<span class="pl-s">"doc1"</span>).<span class="pl-en">get</span>();
  <span class="pl-en">print</span>(<span class="pl-s">"RESULT: "</span> <span class="pl-k">+</span> result.data.<span class="pl-en">toString</span>());
}

<span class="pl-k">void</span> <span class="pl-en">main</span>() {
  <span class="pl-en">query</span>();
  <span class="pl-en">runApp</span>(<span class="pl-k">new</span> <span class="pl-c1">MyApp</span>());
}

<span class="pl-k">class</span> <span class="pl-c1">MyApp</span> <span class="pl-k">extends</span> <span class="pl-c1">StatelessWidget</span> {
  <span class="pl-c">// This widget is the root of your application.</span>
  <span class="pl-k">@override</span>
  <span class="pl-c1">Widget</span> <span class="pl-en">build</span>(<span class="pl-c1">BuildContext</span> context) {
    <span class="pl-k">return</span> <span class="pl-k">new</span> <span class="pl-c1">MaterialApp</span>(
      title<span class="pl-k">:</span> <span class="pl-s">'Flutter Demo'</span>,
      home<span class="pl-k">:</span> <span class="pl-k">new</span> <span class="pl-c1">Home</span>(title<span class="pl-k">:</span><span class="pl-s">"Nothing Special"</span>),
    );
  }
}</pre></div>
<h2 dir="auto">Logs</h2>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="03-01 00:24:42.975 7906-7926/com.project E/flutter: [ERROR:topaz/lib/tonic/logging/dart_error.cc(16)] Unhandled exception:
    type '_InternalLinkedHashMap' is not a subtype of type 'Map&lt;String, dynamic&gt;' where
      _InternalLinkedHashMap is from dart:collection
      Map is from dart:core
      String is from dart:core
    
    #0      DocumentReference.get (file:///home/tarcisio/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.2.9/lib/src/document_reference.dart)
    &lt;asynchronous suspension&gt;
    #1      query (file:///home/tarcisio/AndroidStudioProjects/test_flutter/lib/main.dart:10:87)
    &lt;asynchronous suspension&gt;
    #2      main (file:///home/tarcisio/AndroidStudioProjects/test_flutter/lib/main.dart:15:3)
    #3      _startIsolate.&lt;anonymous closure&gt; (dart:isolate/isolate_patch.dart:279:19)
    #4      _RawReceivePortImpl._handleMessage (dart:isolate/isolate_patch.dart:165:12)"><pre class="notranslate"><code class="notranslate">03-01 00:24:42.975 7906-7926/com.project E/flutter: [ERROR:topaz/lib/tonic/logging/dart_error.cc(16)] Unhandled exception:
    type '_InternalLinkedHashMap' is not a subtype of type 'Map&lt;String, dynamic&gt;' where
      _InternalLinkedHashMap is from dart:collection
      Map is from dart:core
      String is from dart:core
    
    #0      DocumentReference.get (file:///home/tarcisio/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.2.9/lib/src/document_reference.dart)
    &lt;asynchronous suspension&gt;
    #1      query (file:///home/tarcisio/AndroidStudioProjects/test_flutter/lib/main.dart:10:87)
    &lt;asynchronous suspension&gt;
    #2      main (file:///home/tarcisio/AndroidStudioProjects/test_flutter/lib/main.dart:15:3)
    #3      _startIsolate.&lt;anonymous closure&gt; (dart:isolate/isolate_patch.dart:279:19)
    #4      _RawReceivePortImpl._handleMessage (dart:isolate/isolate_patch.dart:165:12)
</code></pre></div>
<p dir="auto">Run <code class="notranslate">flutter analyze</code> and attach any output of that command also.</p>
<h2 dir="auto">Flutter Doctor</h2>
<p dir="auto">-&gt; No Issues found!</p>
<h2 dir="auto">Steps to Reproduce</h2>
<p dir="auto">I'm new to using Flutter / Dart, apologise in advance if this is something very basic. I've checked through all the documentation for the firebase database plugin and checked all the codelabs, this (what I deem simple) action is frustratingly hard to achieve.</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="final DatabaseReference reference = FirebaseDatabase.instance.reference().child('/');
final DataSnapshot snapshot = await reference.once();
print(snapshot.value); // returns a JSON object in the console."><pre class="notranslate"><code class="notranslate">final DatabaseReference reference = FirebaseDatabase.instance.reference().child('/');
final DataSnapshot snapshot = await reference.once();
print(snapshot.value); // returns a JSON object in the console.
</code></pre></div>
<p dir="auto">How do I iterate over this value? I have tried to cast snapshot.value to a Map&lt;String, String&gt; and also tried snapshot.value.forEach (as in the <a href="https://firebase.google.com/docs/reference/js/firebase.database.DataSnapshot#forEach" rel="nofollow">docs</a>) but this isn't supported.</p>
<p dir="auto">The flutter logs are unfortunately also not very useful:</p>
<h2 dir="auto">Logs</h2>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="Reloaded 1 of 446 libraries in 464ms.
[VERBOSE-2:dart_error.cc(16)] Unhandled exception:
	NoSuchMethodError: Class '_InternalLinkedHashMap' has no instance method 'call'.
	Receiver: _LinkedHashMap len:1
	Tried calling: call()
	#0      Object._noSuchMethod (dart:core-patch/object_patch.dart:42)
	#1      Object.noSuchMethod (dart:core-patch/object_patch.dart:46)
	#2      _MyHomePageState.printFirebaseData (/Users/gurmukh/Library/Developer/CoreSimulator/Devices/96A5FE84-FD46-4A01-884B-E38069E0671E/data/Containers/Data/Application/8A200DD5-9395-4CFB-9545-E6B1C96D7F82/tmp/cryptoporfolioxS4M60/cryptoporfolio/lib/main.dart:73:14)
	&lt;asynchronous suspension&gt;
	#3      _MyHomePageState.build (/Users/gurmukh/Library/Developer/CoreSimulator/Devices/96A5FE84-FD46-4A01-884B-E38069E0671E/data/Containers/Data/Application/8A200DD5-9395-4CFB-9545-E6B1C96D7F82/tmp/cryptoporfolioxS4M60/cryptoporfolio/lib/main.dart:79:5)
	#4      StatefulElement.build (package:flutter/src/widgets/framework.dart:3624:27)
	#5      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3534:15)
	#6      Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#7      StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#8      Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#9      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#10     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#11     ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#12     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#13     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#14     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#15     StatelessElement.update (package:flutter/src/widgets/framework.dart:3596:5)
	#16     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#17     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#18     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#19     RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:4250:32)
	#20     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4631:17)
	#21     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#22     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#23     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#24     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#25     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#26     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#27     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#28     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#29     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#30     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#31     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#32     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#33     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#34     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#35     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#36     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#37     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#38     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#39     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#40     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#41     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#42     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#43     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#44     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#45     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#46     StatelessElement.update (package:flutter/src/widgets/framework.dart:3596:5)
	#47     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#48     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#49     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#50     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#51     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#52     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#53     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#54     ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#55     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#57     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#59     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#60     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#61     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#62     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#63     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#64     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#65     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#66     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#67     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#68     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#69     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#70     RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:4250:32)
	#71     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4631:17)
	#72     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#73     _TheatreElement.update (package:flutter/src/widgets/overlay.dart:507:16)
	#74     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#75     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#76     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#77     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#78     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#79     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#80     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#81     ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#82     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#83     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#84     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#85     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#86     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#87     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#88     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#89     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#90     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#91     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#92     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#93     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#94     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#96     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#98     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#99     StatelessElement.update (package:flutter/src/widgets/framework.dart:3596:5)
	#100    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#101    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#102    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#103    ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#104    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#105    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#106    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#107    ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#108    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#109    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#110    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#111    ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#112    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#113    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#114    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#115    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#116    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#117    StatelessElement.update (package:flutter/src/widgets/framework.dart:3596:5)
	#118    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#119    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#120    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#121    StatelessElement.update (package:flutter/src/widgets/framework.dart:3596:5)
	#122    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#124    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#125    StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#126    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#127    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#128    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#129    ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#130    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#131    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#132    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#133    ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#134    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#135    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#136    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#137    StatelessElement.update (package:flutter/src/widgets/framework.dart:3596:5)
	#138    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#139    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#140    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#141    StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#142    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#143    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#144    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#145    ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#146    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#147    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#148    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#149    StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#150    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#151    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#152    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#153    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2260:33)
	#154    BindingBase&amp;SchedulerBinding&amp;GestureBinding&amp;ServicesBinding&amp;RendererBinding&amp;WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:503:20)
	#155    BindingBase&amp;SchedulerBinding&amp;GestureBinding&amp;ServicesBinding&amp;RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:189:5)
	#156    BindingBase&amp;SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:695:15)
	#157    BindingBase&amp;SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:643:9)
	#158    BindingBase&amp;SchedulerBinding&amp;GestureBinding&amp;ServicesBinding&amp;RendererBinding.scheduleWarmUpFrame.&lt;anonymous closure&gt; (package:flutter/src/rendering/binding.dart:275:20)
	#159    Timer._createTimer.&lt;anonymous closure&gt; (dart:async-patch/timer_patch.dart:21)
	#160    _Timer._runTimers (dart:isolate-patch/timer_impl.dart:366)
	#161    _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:394)
	#162    _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:151)

"><pre class="notranslate"><code class="notranslate">Reloaded 1 of 446 libraries in 464ms.
[VERBOSE-2:dart_error.cc(16)] Unhandled exception:
	NoSuchMethodError: Class '_InternalLinkedHashMap' has no instance method 'call'.
	Receiver: _LinkedHashMap len:1
	Tried calling: call()
	#0      Object._noSuchMethod (dart:core-patch/object_patch.dart:42)
	#1      Object.noSuchMethod (dart:core-patch/object_patch.dart:46)
	#2      _MyHomePageState.printFirebaseData (/Users/gurmukh/Library/Developer/CoreSimulator/Devices/96A5FE84-FD46-4A01-884B-E38069E0671E/data/Containers/Data/Application/8A200DD5-9395-4CFB-9545-E6B1C96D7F82/tmp/cryptoporfolioxS4M60/cryptoporfolio/lib/main.dart:73:14)
	&lt;asynchronous suspension&gt;
	#3      _MyHomePageState.build (/Users/gurmukh/Library/Developer/CoreSimulator/Devices/96A5FE84-FD46-4A01-884B-E38069E0671E/data/Containers/Data/Application/8A200DD5-9395-4CFB-9545-E6B1C96D7F82/tmp/cryptoporfolioxS4M60/cryptoporfolio/lib/main.dart:79:5)
	#4      StatefulElement.build (package:flutter/src/widgets/framework.dart:3624:27)
	#5      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3534:15)
	#6      Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#7      StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#8      Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#9      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#10     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#11     ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#12     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#13     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#14     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#15     StatelessElement.update (package:flutter/src/widgets/framework.dart:3596:5)
	#16     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#17     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#18     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#19     RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:4250:32)
	#20     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4631:17)
	#21     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#22     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#23     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#24     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#25     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#26     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#27     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#28     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#29     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#30     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#31     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#32     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#33     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#34     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#35     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#36     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#37     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#38     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#39     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#40     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#41     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#42     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#43     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#44     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#45     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#46     StatelessElement.update (package:flutter/src/widgets/framework.dart:3596:5)
	#47     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#48     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#49     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#50     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#51     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#52     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#53     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#54     ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#55     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#56     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#57     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#58     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#59     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#60     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#61     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#62     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#63     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#64     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#65     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#66     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#67     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#68     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#69     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#70     RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:4250:32)
	#71     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4631:17)
	#72     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#73     _TheatreElement.update (package:flutter/src/widgets/overlay.dart:507:16)
	#74     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#75     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#76     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#77     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#78     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#79     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#80     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#81     ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#82     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#83     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#84     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#85     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#86     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#87     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#88     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#89     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#90     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#91     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#92     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#93     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#94     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#95     StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#96     Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#97     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#98     Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#99     StatelessElement.update (package:flutter/src/widgets/framework.dart:3596:5)
	#100    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#101    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#102    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#103    ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#104    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#105    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#106    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#107    ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#108    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#109    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#110    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#111    ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#112    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#113    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:4523:14)
	#114    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#115    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#116    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#117    StatelessElement.update (package:flutter/src/widgets/framework.dart:3596:5)
	#118    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#119    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#120    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#121    StatelessElement.update (package:flutter/src/widgets/framework.dart:3596:5)
	#122    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#123    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#124    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#125    StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#126    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#127    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#128    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#129    ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#130    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#131    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#132    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#133    ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#134    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#135    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#136    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#137    StatelessElement.update (package:flutter/src/widgets/framework.dart:3596:5)
	#138    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#139    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#140    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#141    StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#142    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#143    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#144    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#145    ProxyElement.update (package:flutter/src/widgets/framework.dart:3781:5)
	#146    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#147    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#148    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#149    StatefulElement.update (package:flutter/src/widgets/framework.dart:3671:5)
	#150    Element.updateChild (package:flutter/src/widgets/framework.dart:2674:15)
	#151    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3546:16)
	#152    Element.rebuild (package:flutter/src/widgets/framework.dart:3435:5)
	#153    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2260:33)
	#154    BindingBase&amp;SchedulerBinding&amp;GestureBinding&amp;ServicesBinding&amp;RendererBinding&amp;WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:503:20)
	#155    BindingBase&amp;SchedulerBinding&amp;GestureBinding&amp;ServicesBinding&amp;RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:189:5)
	#156    BindingBase&amp;SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:695:15)
	#157    BindingBase&amp;SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:643:9)
	#158    BindingBase&amp;SchedulerBinding&amp;GestureBinding&amp;ServicesBinding&amp;RendererBinding.scheduleWarmUpFrame.&lt;anonymous closure&gt; (package:flutter/src/rendering/binding.dart:275:20)
	#159    Timer._createTimer.&lt;anonymous closure&gt; (dart:async-patch/timer_patch.dart:21)
	#160    _Timer._runTimers (dart:isolate-patch/timer_impl.dart:366)
	#161    _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:394)
	#162    _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:151)


</code></pre></div>