copy method

Data copy()

Implementation

Data copy() {
  dynamic v = _value;
  if (_value is Map) {
    v = (_value as Map).map<String, Data>((k, v) => MapEntry(k, v.copy()));
  }
  if (_value is List) v = _value.map((e) => e.copy()).toList();
  return Data(v, exists: exists);
}