public void AllocatorBorrowTest1()
        {
            Allocator allocator = Allocator.Default;

            allocator.Borrow <int>(100, stackAlloc: true, (span, length) =>
            {
                Assert.AreEqual(100, span.Length);

                for (int i = 0; i < length; i++)
                {
                    Assert.AreEqual(0, span[i]);
                }

                span.Fill(2);

                for (int i = 0; i < length; i++)
                {
                    Assert.AreEqual(2, span[i]);
                }
            });
        }