validate method

@override bool validate()

validate command line arguments

Implementation

@override
bool validate() {
  super.validate();
  if (args.length > 2) {
    var unnecessaryParameter = args.skip(2).toList();
    throw CliException(
        LocaleKeys.error_unnecessary_parameter.trArgsPlural(
          LocaleKeys.error_unnecessary_parameter_plural,
          unnecessaryParameter.length,
          [unnecessaryParameter.toString()],
        ),
        codeSample: codeSample);
  }
  return true;
}