anchor.diff:    CheckIntegerValidator,
     LowerBoundValidator,
     MaterialInputComponent,
  +  MaterialInt64ValueAccessor,
     MaterialNumberValueAccessor,
     MaterialNumberValidator,
     PositiveNumValidator,
  
positive.code: 
  import 'package:angular/angular.dart';
  import 'package:angular_forms/angular_forms.dart';
  import 'package:intl/intl.dart';
  import 'package:quiver/strings.dart';
  import 'package:angular_components/utils/angular/properties/properties.dart';
  
negative.code:       desc: 'Error message when input number is not an integer.',
        meaning: 'Error message when input number is not an integer.');
  }
  
  NumberFormat decimalNumberFormat() => NumberFormat.decimalPattern();
  
  /// Helper directive to provide a basic [NumberFormat] pattern for use with
  /// number accessors.
  ///
  /// This is not necessary for standard material-input[type=num] as it's provided
  /// as the default.  It should only be used with material-input[type=int64].
  @Directive(
    selector: '[decimalNumberFormat]',
    providers: [Provider(NumberFormat, useFactory: decimalNumberFormat)],
  )
  class DecimalNumberFormatDirective {}
  