Adldap\Query\Builder::findByDn PHP Method

    public function findByDn($dn, $columns = [])
    {
        return $this->setDn($dn)->read(true)->whereHas($this->schema->objectClass())->first($columns);
    }

 /**
  * Returns the Container of the current Model.
  *
  * https://msdn.microsoft.com/en-us/library/ms679012(v=vs.85).aspx
  *
  * @return Container|Entry|bool
  */
 public function getObjectClass()
 {
     return $this->query->findByDn($this->getObjectCategoryDn());
 }