toJson method

Implementation

@override
Map<String, dynamic> toJson() {
  return {
    '@type': 'sendMessageAlbum',
    if (extra != null) '@extra': extra,
    'chat_id': chat_id,
    'message_thread_id': message_thread_id,
    'reply_to': reply_to,
    'options': options,
    'input_message_contents': input_message_contents,
    'only_preview': only_preview
  };
}