public void Test_Map_WhenNullPropWrapper_ShouldReturnNull()
        {
            //---------------Set up test pack-------------------
            PropertyWrapper propertyWrapper = null;
            //---------------Assert Precondition----------------
            //---------------Execute Test ----------------------
            var relationshipDefCol = propertyWrapper.MapManyToOne();

            //---------------Test Result -----------------------
            Assert.IsNull(relationshipDefCol);
        }