public function doClone($a_pool_id)
 {
     $new_obj = new self();
     $new_obj->setPoolId($a_pool_id);
     $new_obj->setTitle($this->getTitle());
     $new_obj->setRaster($this->getRaster());
     $new_obj->setMinRental($this->getMinRental());
     $new_obj->setMaxRental($this->getMaxRental());
     $new_obj->setAutoBreak($this->getAutoBreak());
     $new_obj->setDeadline($this->getDeadline());
     $new_obj->setDefinition($this->getDefinition());
     return $new_obj->save();
 }