/**
  * @name existe($pOperation)
  * @param OperationVO ou interger
  * @return bool
  * @desc Vérifie si l'Operation existe
  */
 public function existe($pOperation)
 {
     $lOperationValid = new OperationValid();
     if (is_object($pOperation) && $lOperationValid->estOperation($pOperation)) {
         $lOperation = $this->get($pOperation);
         if ($lOperation->getId() == $pOperation->getId()) {
             return true;
         } else {
             return false;
         }
     } else {
         if (is_int((int) $pOperation)) {
             if ($lOperationValid->id($pOperation)) {
                 $lOperation = $this->get($pOperation);
                 if ($lOperation->getId() == $pOperation) {
                     return true;
                 } else {
                     return false;
                 }
             }
         } else {
             return false;
         }
     }
 }