public function permCacheKey(DataObject $node)
    {
        if ($node && $node->ID) {
            return self::ITEM_PREFIX . $this->idStr($node);
        }
    }
public function permCacheKey(DataObject $node)
    {
        if ($node && $node->ID) {
            return self::ITEM_PREFIX . $this->idStr($node);
        }
    }
public function permCacheKey ( DataObject $ node ) { if ( $ node && $ node -> ID ) { return self :: ITEM_PREFIX . $ this -> idStr ( $ node ) ; } }
Get the key for this item in the cache

@param type $perm
@return string
Get the key for this item in the cache