code: def wait_until_page_contains(self, text, timeout=None, error=None):
          
          if not error:
              error = "Text '%s' did not appear in <TIMEOUT>" % text
          self._wait_until(timeout, error, self._is_text_present, text)
docs: Waits until `text` appears on current page.
  
          Fails if `timeout` expires before the text appears. See
          `introduction` for more information about `timeout` and its
          default value.
  
          `error` can be used to override the default error message.
  
          See also `Wait Until Page Does Not Contain`,
          `Wait Until Page Contains Element`,
          `Wait Until Page Does Not Contain Element` and
          BuiltIn keyword `Wait Until Keyword Succeeds`.