/**
* Checks if a given object is linked to this one.
* @param $obj the object to execute this method on
* @param $toObj the other object
* @return bool true if linked
*/
public function isLinkedToObject(ParaObject $obj = null, ParaObject $toObj = null)
{
if ($obj == null || $obj->getId() == null || $toObj == null || $toObj->getId() == null) {
return false;
}
return $this->isLinked($obj, $toObj->getType(), $toObj->getId());
}