public void Returns2Point7IfValueIsasdfAndFallbackIs2Point7()
            {
                var value = ValueRetrieval.GetDouble("asdf", (double)2.7);

                Assert.That(value, Is.EqualTo((double)2.7));
            }
            public void Returns1Point12IfValueIs1Point12()
            {
                var value = ValueRetrieval.GetDouble("1.12");

                Assert.That(value, Is.EqualTo((double)1.12));
            }
            public void Returns1Point3IfValueIsNullAndFallbackIs1Point3()
            {
                var value = ValueRetrieval.GetDouble(null, (double)1.3);

                Assert.That(value, Is.EqualTo((double)1.3));
            }
            public void ReturnsNullIfValueIsasdf()
            {
                var value = ValueRetrieval.GetDouble("asdf");

                Assert.That(value, Is.EqualTo(null));
            }