getString method

@override String? getString(Object? str)

Implementation

@override
String? getString(Object? str) {
  if (str == null) {
    return null;
  } else if (str is Stringer) {
    return str.toString();
  } else if (str is String) {
    return str;
  } else {
    assert(false, 'string error: $str');
    return str.toString();
  }
}