toOptionsJSON method
Implementation
@override
void toOptionsJSON(StringBuffer buffer) {
  super.toOptionsJSON(buffer);
  if (whiteSpace != null) {
    buffer.writeAll(['"whiteSpace":', jsonEncode(whiteSpace), ','], '');
  }
}@override
void toOptionsJSON(StringBuffer buffer) {
  super.toOptionsJSON(buffer);
  if (whiteSpace != null) {
    buffer.writeAll(['"whiteSpace":', jsonEncode(whiteSpace), ','], '');
  }
}