code: def open(self):
          
          if self.seed_url:
              self.driver_adapter.open(self.seed_url)
              self.wait_for_page_to_load()
              return self
          raise UsageError("Set a base URL or URL_TEMPLATE to open this page.")
docs: Open the page.
  
          Navigates to :py:attr:`seed_url` and calls :py:func:`wait_for_page_to_load`.
  
          :return: The current page object.
          :rtype: :py:class:`Page`
          :raises: UsageError