toJson method
Implementation
@override
Map<String, dynamic> toJson([dynamic extra]) {
return {
"@type": CONSTRUCTOR,
"id": id,
"title": title,
"voice_note_url": voiceNoteUrl,
"voice_note_duration": voiceNoteDuration,
"reply_markup": replyMarkup?.toJson(),
"input_message_content": inputMessageContent.toJson(),
};
}