getValidationErrors method

@override List<String> getValidationErrors()

Gets validation error messages.

Returns a list of human-readable error messages explaining why the interaction is invalid. Called when validate returns false.

Defaults to empty list.

Implementation

@override
List<String> getValidationErrors() {
  final errors = <String>[];
  if (id.isEmpty) errors.add('ID cannot be empty');
  if (_payload == null) errors.add('Payload cannot be null');
  return errors;
}