public async Task ReleaseLockAsync_always_returns(DummyConcurrencyService sut, string token)
 {
     await sut.ReleaseLockAsync(token);
 }
        public async Task TryAcquireLockAsync_returns_true(DummyConcurrencyService sut, string token)
        {
            var result = await sut.TryAcquireLockAsync(token);

            Assert.That(result, Is.True);
        }