charset example

public function negotiate(string $type, array $supported, bool $strictMatch = false): string
    {
        if ($this->negotiator === null) {
            $this->negotiator = Services::negotiator($this, true);
        }

        switch (strtolower($type)) {
            case 'media':
                return $this->negotiator->media($supported, $strictMatch);

            case 'charset':
                return $this->negotiator->charset($supported);

            case 'encoding':
                return $this->negotiator->encoding($supported);

            case 'language':
                return $this->negotiator->language($supported);
        }

        throw HTTPException::forInvalidNegotiationType($type);
    }