NativeD_TIMConvRenameConversationGroup typedef
        NativeD_TIMConvRenameConversationGroup =
     Int Function(Pointer<Uint8>  old_name, Pointer<Uint8>  new_name, Pointer<Uint8>  user_data)
    
    
    
Implementation
typedef NativeD_TIMConvRenameConversationGroup = ffi.Int Function(ffi.Pointer<ffi.Uint8> old_name, ffi.Pointer<ffi.Uint8> new_name, ffi.Pointer<ffi.Uint8> user_data);