toJson method
override
    Returns a Map representing this ChatMessage.
Implementation
@override
Map<String, dynamic> toJson() =>
    _$ChatMessageToJson(this)..['runtimeType'] = 'ChatMessage';
Returns a Map representing this ChatMessage.
@override
Map<String, dynamic> toJson() =>
    _$ChatMessageToJson(this)..['runtimeType'] = 'ChatMessage';