public UniversityMutation(UniversalRepository universalRepository, CourseMessageService courseMessageService)
        {
            _universalRepository  = universalRepository;
            _courseMessageService = courseMessageService;

            Name = "Mutation";

            Field <CourseType>(
                "createCourse",
                arguments: new QueryArguments(new QueryArgument <NonNullGraphType <CourseInputType> > {
                Name = "course"
            }),
                resolve: context =>
            {
                var course = context.GetArgument <Course>("course");
                var result = _universalRepository.AddCourse(course);

                return(_courseMessageService.AddMessage(result));
            });
        }