protected function _collection()
    {
        if (!isset($this->_collections[$this->_collection])) {
            $this->_collections[$this->_collection] = new $this->_collectionClass($this);
        }

        return $this->_collections[$this->_collection];
    }
protected function _collection()
    {
        if (!isset($this->_collections[$this->_collection])) {
            $this->_collections[$this->_collection] = new $this->_collectionClass($this);
        }

        return $this->_collections[$this->_collection];
    }
protected function _collection ( ) { if ( ! isset ( $ this -> _collections [ $ this -> _collection ] ) ) { $ this -> _collections [ $ this -> _collection ] = new $ this -> _collectionClass ( $ this ) ; } return $ this -> _collections [ $ this -> _collection ] ; }
Get instance for current collection.

@return \Search\Model\Filter\FilterCollectionInterface
Get instance for current collection .