NativeD_TIMConvAddConversationsToGroup typedef
        NativeD_TIMConvAddConversationsToGroup =
     Int Function(Pointer<Uint8>  group_name, Pointer<Uint8>  conversation_id_array, Pointer<Uint8>  user_data)
    
    
    
Implementation
typedef NativeD_TIMConvAddConversationsToGroup = ffi.Int Function(ffi.Pointer<ffi.Uint8> group_name, ffi.Pointer<ffi.Uint8> conversation_id_array, ffi.Pointer<ffi.Uint8> user_data);