code: def init_app(self, app):
          
          self._jobs = []
  
          if not hasattr(app, 'extensions'):
              app.extensions = {}
  
          app.extensions['restpoints'] = self
          app.restpoints_instance = self
          app.add_url_rule('/ping', 'ping', ping)
          app.add_url_rule('/time', 'time', time)
          app.add_url_rule('/status', 'status', status(self._jobs))
docs: Initialize a :class:`~flask.Flask` application for use with
          this extension.