validate method

  1. @override
Future<ValidationResult?> validate(
  1. BuildContext context,
  2. T? value,
  3. FormValidationMode state
)
override

Implementation

@override
Future<ValidationResult?> validate(
    BuildContext context, T? value, FormValidationMode state) async {
  if (!await predicate(value)) {
    return InvalidResult(message);
  }
  return null;
}