public void TryConvertToObjectItemTest()
        {
            var c = new NullableDoubleConverter();

            Assert.IsTrue(c.TryConvertToObjectItem(CreateConvertToObjectItemContext(string.Empty), out object?result, out string _));
            Assert.IsNull(result);
        }
        public void ConvertToCsvItemTest()
        {
            var c = new NullableDoubleConverter();

            Assert.AreEqual(string.Empty, c.ConvertToCsvItem(CreateConvertToCsvItemContext(null)));
        }