public void Test_FdbQueryRangeExpression()
        {
            var expr = FdbQueryExpressions.Range(
                KeySelectorPair.Create(TuPack.ToKeyRange("Foo"))
                );

            Log(expr);

            Assert.That(expr, Is.Not.Null);
            Assert.That(expr.Range.Begin.Key.ToString(), Is.EqualTo("<02>Foo<00><00>"));
            Assert.That(expr.Range.End.Key.ToString(), Is.EqualTo("<02>Foo<00><FF>"));

            Assert.That(expr.Type, Is.EqualTo(typeof(IAsyncEnumerable <KeyValuePair <Slice, Slice> >)));
            Assert.That(expr.ElementType, Is.EqualTo(typeof(KeyValuePair <Slice, Slice>)));

            Log(FdbQueryExpressions.ExplainSequence(expr));
        }