/**
  * Retrieves the instance of ComponentHelper for this project
  */
 public static function getComponentHelper(Project $project)
 {
     if ($project === null) {
         return null;
     }
     $ph = $project->getReference(self::COMPONENT_HELPER_REFERENCE);
     if ($ph !== null) {
         return $ph;
     }
     $ph = new ComponentHelper();
     $ph->setProject($project);
     $project->addReference(self::COMPONENT_HELPER_REFERENCE, $ph);
     return $ph;
 }