toJson method

@override Map<String, dynamic> toJson()

Implementation

@override
Map<String, dynamic> toJson() {
  return {
    ...super.toJson(),
    if (contents != null) 'contents': contents,
    if (color != null) 'color': Annotation._colorToHex(color!),
    if (symbol != null) 'symbol': symbol,
  };
}