anchor.diff:    DateRangeEditorComponent(
         this._elementRef,
         this._domService,
  -      this._managedZone,
  +      this._ngZone,
         @Optional() DateRangeEditorHost editorHost,
         @Optional() @Inject(datepickerClock) Clock clock,
         Clock legacyClock) {
  
positive.code: import 'package:angular_components/model/date/date.dart';
  import 'package:angular_components/model/date/date_formatter.dart';
  import 'package:angular_components/model/observable/observable.dart';
  import 'package:angular_components/utils/angular/managed_zone/interface.dart';
  import 'package:angular_components/utils/angular/scroll_host/angular_2.dart';
  import 'package:angular_components/utils/browser/dom_service/dom_service.dart';
  import 'package:angular_components/utils/showhide/showhide.dart';
  
negative.code: 
    final Element _elementRef;
    final DomService _domService;
    final NgZone _ngZone;
  
    // This controls when the calendar is created.
    // By default, this is null, and the calendar will be created shortly
  