private function get($key, $value, $default)
    {
        if ($this->has($key)) {
            return $this->data[$key][$value];
        } else {
            return $default;
        }
    }
private function get($key, $value, $default)
    {
        if ($this->has($key)) {
            return $this->data[$key][$value];
        } else {
            return $default;
        }
    }
private function get ( $ key , $ value , $ default ) { if ( $ this -> has ( $ key ) ) { return $ this -> data [ $ key ] [ $ value ] ; } else { return $ default ; } }
Returns data by associated key

@param string $key
@param string $value
@param mixed $default Value to be returned in case key doesn't exist
@return mixed
Returns data by associated key