public function hint($columns, $mode = null)
    {
        $this->hint = $columns;
        $this->hintMode = $mode;
        return $this;
    }
public function hint($columns, $mode = null)
    {
        $this->hint = $columns;
        $this->hintMode = $mode;
        return $this;
    }
public function hint ( $ columns , $ mode = null ) { $ this -> hint = $ columns ; $ this -> hintMode = $ mode ; return $ this ; }
Hint at index to use

@param mixed $columns
@param string $mode
@return $this
Hint at index to use