validate method

@override Map<String, dynamic>? validate(AbstractControl control)

Validates the control.

Implementation

@override
Map<String, dynamic>? validate(AbstractControl<dynamic> control) {
  return control.value == value
      ? null
      : <String, dynamic>{
          validationMessage: <String, dynamic>{
            'required': value,
            'actual': control.value,
          }
        };
}