code: @Override
      public String getReverseRouteFor(Controller controller, String method, String var1, Object val1) {
          return getReverseRouteFor(controller, method, ImmutableMap.of(var1, val1));
      }
docs: Gets the url of the route handled by the specified action method.
  
  @param controller the controller object
  @param method     the controller method
  @param var1       the first parameter name
  @param val1       the first parameter value
  @return the url, {@literal null} if the action method is not found.