20     private $method;  variable in GuzzleHttp\\Psr7\\Request
29      * @param string                               $method  HTTP method
36         string $method,  argument
42         $this->assertMethod($method);
47         $this->method = strtoupper($method);
94         return $this->method;
97     public function withMethod($method): RequestInterface  argument
99         $this->assertMethod($method);
101         $new->method = strtoupper($method);
151      * @param mixed $method
153     private function assertMethod($method): void  argument
155         if (!is_string($method) || $method === '') {