docs: def renderHTTP(self, context):
          """
          Render C{self.resource} through a L{StylesheetRewritingRequestWrapper}.
          """
          request = IRequest(context)
          request = StylesheetRewritingRequestWrapper(
              request, self.installedOfferingNames, self.rootURL)
          context.remember(request, IRequest)
          return self.resource.renderHTTP(context)