attachment 目录参考

文件
文件	V2NIMChatroomChatBannedNotificationAttachment.java [代码]
文件	V2NIMChatroomMemberEnterNotificationAttachment.java [代码]
文件	V2NIMChatroomMemberRoleUpdateAttachment.java [代码]
文件	V2NIMChatroomMessageRevokeNotificationAttachment.java [代码]
文件	V2NIMChatroomNotificationAttachment.java [代码]
文件	V2NIMChatroomQueueNotificationAttachment.java [代码]