validate method

@override String? validate(String? value)

Validates the given value and returns an error message if the value is invalid.

Implementation

@override
String? validate(String? value) {
  if (value != null) {
    if (value.length != length) {
      return getErrorMessage(
        EasyValidatorMessages.instance.equalLength,
        length.toString(),
      );
    }
  }
  return null;
}