90         $uri = $args[0];
94             ? $this->requestAsync(substr($method, 0, -5), $uri, $opts)
95             : $this->request($method, $uri, $opts);
141      * @param string|UriInterface $uri     URI object or string.
146     public function requestAsync($method, $uri = '', array $options = [])  argument
154         $uri = $this->buildUri($uri, $options);
158         $request = new Psr7\Request($method, $uri, $headers, $body, $version);
173      * @param string|UriInterface $uri     URI object or string.
179     public function request($method, $uri = '', array $options = [])  argument
182         return $this->requestAsync($method, $uri, $options)->wait();
204      * @param  string|null $uri
208     private function buildUri($uri, array $config)  argument
211         $uri = Psr7\uri_for($uri === null ? '' : $uri);
214             $uri = Psr7\UriResolver::resolve(Psr7\uri_for($config['base_uri']), $uri);
219             $uri = Utils::idnUriConvert($uri, $idnOptions);
222         return $uri->getScheme() === '' && $uri->getHost() !== '' ? $uri->withScheme('http') : $uri;