code: def render_search(self, ctx, data):
          
          if self.username is None:
              return ''
          translator = self._getViewerPrivateApplication()
          searchAggregator = translator.getPageComponents().searchAggregator
          if searchAggregator is None or not searchAggregator.providers():
              return ''
          return ctx.tag.fillSlots(
              'form-action', translator.linkTo(searchAggregator.storeID))
docs: Render some UI for performing searches, if we know about a search
          aggregator.