18     private $method;  variable in GuzzleHttp\\Psr7\\Request
27      * @param string                               $method  HTTP method
34         $method,  argument
40         $this->assertMethod($method);
45         $this->method = strtoupper($method);
91         return $this->method;
94     public function withMethod($method)  argument
96         $this->assertMethod($method);
98         $new->method = strtoupper($method);
146     private function assertMethod($method)  argument
148         if (!is_string($method) || $method === '') {