/**
  * Recursive root catalogue accessor
  *
  * @return self
  */
 function getRootCatalogue()
 {
     if (!$this->pere_id) {
         return $this;
     }
     $this->loadParent();
     return $this->_ref_pere->getRootCatalogue();
 }
 /**
  * Recursive root catalogue accessor
  */
 function getRootCatalogue()
 {
     $this->loadCatalogue();
     return $this->_ref_root_catalogue = $this->_ref_catalogue_labo->getRootCatalogue();
 }