Drest\DrestException::unableToFindRouteByName PHP Method

    public static function unableToFindRouteByName($routeName, $className)
    {
        return new self('Unable to find the named route "' . $routeName . '" on class ' . $className);
    }

 /**
  * Get a route based on Entity::route_name. eg Entities\User::get_users
  * Syntax checking is performed
  * @param  string         $name
  * @param  array          $params
  * @throws DrestException on invalid syntax or unmatched named route
  * @return RouteMetaData  $route
  */
 protected function getNamedRoute($name, array $params = array())
 {
     if (substr_count($name, '::') !== 1) {
         throw DrestException::invalidNamedRouteSyntax();
     }
     $parts = explode('::', $name);
     // Allow exception to bubble up
     $classMetaData = $this->getClassMetadata($parts[0]);
     if (($route = $classMetaData->getRoutesMetaData($parts[1])) === false) {
         throw DrestException::unableToFindRouteByName($parts[1], $classMetaData->getClassName());
     }
     $route->setRouteParams($params);
     return $route;
 }