docs: def _parse_xml(self, response):
          """
          Run our XML parser (lxml in this case) over our response text.  Lxml
          doesn't enjoy having xml/encoding information in the header so we strip
          that out if necessary. We return a parsed XML object that can be
          used by the calling API method and massaged into a more appropriate
          format.
          """
          if response.startswith('\n'):
              response = response[1:]
          tree = etree.fromstring(response)
          return tree