ChatSDK Hierarchy Class Hierarchy NSObject MXAddFileEntry MXChat MXChatCategory MXChatClient MXChatConfig MXChatListModel MXChatSession MXFileItem MXSignFileItem MXFolderItem MXMeet MXMeetConfig MXMeetListModel MXMeetParticipant MXMeetSession MXTeamItem MXTodoItem MXToolkit MXUserItem MXUserListModel UIViewController MXChatViewController MXFileViewController MXSignFileViewController MXGlobalSearchViewController MXTodoViewController Protocol References MXChatClientDelegate MXChatListModelDelegate MXChatSessionDelegate MXMeetListModelDelegate MXMeetSessionDelegate MXUserListModelDelegate Constant References MXChatInputPanelLayout MXChatMemberAccessType MXChatSDKError MXChatViewControllerTab MXFileSigneeState MXMeetParticipantState MXSignFileItemState