public function getFiltering()
    {
        if ($this->filtering === null) {
            $this->filtering = new Filtering($this);
        }
        return $this->filtering;
    }
public function getFiltering()
    {
        if ($this->filtering === null) {
            $this->filtering = new Filtering($this);
        }
        return $this->filtering;
    }
public function getFiltering ( ) { if ( $ this -> filtering === null ) { $ this -> filtering = new Filtering ( $ this ) ; } return $ this -> filtering ; }
Returns data filtering manager.

@return Filtering
Returns data filtering manager .