src/Neutrino/HttpClient/Uri.php
public function extendQuery(array $params = null)
    {
        $query = empty($this->parts['query']) ? [] : $this->parts['query'];
        $params = empty($params) ? [] : $params;
        $this->parts['query'] = array_merge($query, $params);
        return $this;
    }
public function extendQuery(array $params = null)
    {
        $query = empty($this->parts['query']) ? [] : $this->parts['query'];
        $params = empty($params) ? [] : $params;
        $this->parts['query'] = array_merge($query, $params);
        return $this;
    }
@param array|null $params

@return $this