code: def set_html(self, html, url = None):
      
      if url:
        self.conn.issue_command('SetHtml', html, url)
      else:
        self.conn.issue_command('SetHtml', html)
docs: Sets custom HTML in our Webkit session and allows to specify a fake URL.
      Scripts and CSS is dynamically fetched as if the HTML had been loaded from
      the given URL.