public async Task ShowMultiCast()
        {
            var meidator = MediatRUtils.BuildMediator();
            await meidator.Publish(new Notice { });

            Assert.Equal(2, Notice.Counter);
        }
        public async Task ShowSingleCast()
        {
            var mediator = MediatRUtils.BuildMediator();
            var response = await mediator.Send(new Ping { });

            Assert.Equal("pong", response);
        }