code: @Override
      public String getNoSuffixViewURI(String controllerName, String viewName) {
          TupleStringKey key = new TupleStringKey(controllerName, viewName);
          String uri = noSuffixViewURICache.get(key);
          if (uri == null) {
              uri = super.getNoSuffixViewURI(controllerName, viewName);
              String prevuri = noSuffixViewURICache.putIfAbsent(key, uri);
              if (prevuri != null) {
                  return prevuri;
              }
          }
          return uri;
      }
docs: /* (non-Javadoc)
  @see grails.web.pages.GroovyPagesUriService#getNoSuffixViewURI(java.lang.String, java.lang.String)