src/Request.php
public function toUrl()
    {
        $postData = $this->toPostdata();
        $out = $this->getNormalizedHttpUrl();
        if ($postData) {
            $out .= '?' . $postData;
        }
        return $out;
    }
public function toUrl()
    {
        $postData = $this->toPostdata();
        $out = $this->getNormalizedHttpUrl();
        if ($postData) {
            $out .= '?' . $postData;
        }
        return $out;
    }
Builds a url usable for a GET request

@return string