qualifiedString method

Implementation

String qualifiedString() {
  if (argName != null) {
    return V is bool ? 'flag `$argName`' : 'option `$argName`';
  }
  if (envName != null) {
    return 'environment variable `$envName`';
  }
  if (argPos != null) {
    return 'positional argument $argPos';
  }
  if (configKey != null) {
    return 'configuration key `$configKey`';
  }
  return _unnamedOptionString;
}