SendGroupMsgModel(SendGroupMsgModel)

{
    "guid": "string",
    "user_list": [],
    "room_list": [],
    "content": "",
    "image_msg_list": [],
    "video_msg_list": [],
    "weapp_msg_list": [],
    "link_msg_list": [],
    "feed_video_msg_list": [],
    "file_msg_list": []
}