toJson method
Implementation
@override
Map<String, dynamic> toJson() => <String, dynamic>{
'rows': rows
.map((item) => item.map((item) => item.toJson()).toList())
.toList(),
'is_persistent': isPersistent,
'resize_keyboard': resizeKeyboard,
'one_time': oneTime,
'is_personal': isPersonal,
'input_field_placeholder': inputFieldPlaceholder,
'@type': constructor,
};