code: def test_ref_link_override(self):
      self.assertMarkdownRenders(
          self.dedent(
              """
                  [Text]
  
                  [Text]: http://example.com 'ignore'
                  [Text]: https://example.com 'override'
                  """
          ),
          """<p><a href="https://example.com" title="override">Text</a></p>""",
      )
  
imports: from markdown.test_tools import TestCase
label_desc: Use image node_id 12 for calling the TestReferenceLinks obj's underlying member method code with example usage: obj.test_ref_link_override() without return types