public async Task ThenWillIndexManyReservationAtOnce()
        {
            //Act
            await _repository.CreateIndex();

            //Assert
            _client.Verify(x => x.CreateIndicesWithMapping(It.Is <string>(c => c.StartsWith(_repository.IndexNamePrefix)), ExpectedMapping), Times.Once);
            _registryMock.Verify(r => r.Add(It.Is <string>(s => s.StartsWith(_repository.IndexNamePrefix))), Times.Once);
        }