getString method

Implementation

RadString getString(String key) {
  if (_value.containsKey(key)) {
    var value = _value[key];
    if (value.runtimeType == RadString) {
      return value as RadString;
    } else {
      throw RadError('RadMap', 'getString', 'value is not String.');
    }
  } else {
    throw RadError('RadMap', 'getString', 'key $key is not in the Map.');
  }
}