Aerys\Options::setAllowedMethods PHP Method

    private function setAllowedMethods(array $allowedMethods)
    {
        foreach ($allowedMethods as $key => $method) {
            if (!\is_string($method)) {
                throw new \DomainException(\sprintf("Invalid type at key %s of allowed methods array: %s", $key, \is_object($method) ? \get_class($method) : \gettype($method)));
            }
            if ($method === "") {
                throw new \DomainException("Invalid empty HTTP method at key {$key} of allowed methods array");
            }
        }
        if (!\in_array("GET", $allowedMethods)) {
            throw new \DomainException("Servers must support GET as an allowed HTTP method");
        }
        if (!\in_array("HEAD", $allowedMethods)) {
            throw new \DomainException("Servers must support HEAD as an allowed HTTP method");
        }
        $this->allowedMethods = $allowedMethods;
    }