title: Insert a Row inside a Column in Flutter
body: <p>My UI screen is basically rendered using a Column Widget and inside this widget, I am inserting all the other UI components. One of these happens to be a Row ( consisting of 2 text fields). This is the Row Widget :</p>
  
  <pre><code>var phoneNumber = new Row(
    children: &lt;Widget&gt;[
      new Padding(
        padding: const EdgeInsets.all(20.0),
        child: countryCodePicker,
      ),
      new Padding(
        padding: const EdgeInsets.all(20.0),
        child: mobileNumber,
      ),
    ],
  );
  </code></pre>
  
  <p>The Main UI Screen being :</p>
  
  <pre><code>     return SafeArea(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
          children: &lt;Widget&gt;[
                  customerName,
                  emailAddress,
  //                new Container(
  //                  child: deliveryOptionRow,
  //                ),
                  mobileNumber,
                  countryCodePicker,
                  templateMessagesDropDown,
                  templateMessageTextField,
                  sendGoogleReview,
                ],
              )
      );
  </code></pre>
  
  <p>I see this exception when I add the Row to the Column</p>
  
  <pre><code>     The following RenderObject was being processed when the exception was fired:
  flutter:   _RenderListTile#06b03 relayoutBoundary=up11 NEEDS-LAYOUT NEEDS-PAINT
  flutter:   creator: _ListTile ← MediaQuery ← Padding ← SafeArea ← Semantics ← Listener ← _GestureSemantics ←
  flutter:   RawGestureDetector ← GestureDetector ← InkWell ← ListTile ← ListTileTheme ← ⋯
  flutter:   parentData: offset=Offset(0.0, 0.0) (can use size)
  flutter:   constraints: BoxConstraints(unconstrained)
  flutter:   size: MISSING
  flutter: This RenderObject had the following descendants (showing up to depth 5):
  flutter:   _RenderRadio#302a4 relayoutBoundary=up12 NEEDS-PAINT
  flutter:   RenderParagraph#58a45 NEEDS-LAYOUT NEEDS-PAINT
  </code></pre>
  
  <p>What would be the best way to add the row inside the main UI screen. </p>