code: public boolean isClientlibRendered(ClientlibRef reference) {
          for (ClientlibLink link : renderedClientlibs) {
              if (reference.isSatisfiedby(link)) {
                  LOG.debug("already rendered: {} by {}", reference, link.path);
                  return true;
              }
          }
          return false;
      }
docs: Checks whether a referenced resource or client library is satisfied by an already rendered resource.