Pimcore\Model\Dependency::getRequiredBy PHP Method

    public function getRequiredBy()
    {
        return $this->requiredBy;
    }

 /**
  * @param Dependency $d
  * @return array
  */
 public static function getRequiredByDependenciesForFrontend(Dependency $d)
 {
     $dependencies["hasHidden"] = false;
     $dependencies["requiredBy"] = array();
     // requiredBy
     foreach ($d->getRequiredBy() as $r) {
         if ($e = self::getDependedElement($r)) {
             if ($e->isAllowed("list")) {
                 $dependencies["requiredBy"][] = self::getDependencyForFrontend($e);
             } else {
                 $dependencies["hasHidden"] = true;
             }
         }
     }
     return $dependencies;
 }