class MsgAtContent { String? business; String? image; String? sourceContent; String? nativeUri; MsgAtContent({ this.business, this.image, this.sourceContent, this.nativeUri, }); factory MsgAtContent.fromJson(Map json) => MsgAtContent( business: json['business'] as String?, image: json['image'] as String?, sourceContent: json['source_content'] as String?, nativeUri: json['native_uri'] as String?, ); }