public void IsListType()
        {
            // arrange
            var namedType = new NamedTypeNode(null, new NameNode("Foo"));
            var listType  = new ListTypeNode(null, namedType);

            // act
            bool shouldBeFalse = namedType.IsListType();
            bool shouldBeTrue  = listType.IsListType();

            // assert
            Assert.False(shouldBeFalse);
            Assert.True(shouldBeTrue);
        }