anchor.diff:  import 'package:angular_components/material_datepicker/comparison.dart';
   import 'package:angular_components/material_datepicker/comparison_option.dart';
   import 'package:angular_components/material_datepicker/config.dart';
  +import 'package:angular_components/material_datepicker/date_range_editor.dart';
   import 'package:angular_components/material_datepicker/date_range_editor_host.dart';
  -import 'package:angular_components/material_datepicker/date_range_editor.dart';
   import 'package:angular_components/material_datepicker/model.dart';
   import 'package:angular_components/material_datepicker/module.dart';
   import 'package:angular_components/material_datepicker/next_prev_buttons.dart';
  
positive.code:   ],
    providers: [
      ExistingProvider(DateRangeEditorHost, MaterialDateRangePickerComponent),
      ExistingProvider(HasDisabled, MaterialDateRangePickerComponent),
      ExistingProvider(PopupSizeProvider, MaterialDateRangePickerComponent),
    ],
  )
  class MaterialDateRangePickerComponent
      implements
          HasDisabled,
          OnInit,
  
negative.code:     DateRangeEditorComponent,
      DeferredContentDirective,
      DropdownButtonComponent,
      FocusableDirective,
      KeyboardOnlyFocusIndicatorDirective,
      MaterialButtonComponent,
      MaterialPopupComponent,
  