src/Http/ContentNegotiation/LanguageMatcher.php
private function getLanguageValuesFromHeaders(array $headers): array
    {
        $languages = [];

        foreach ($headers as $header) {
            $languages[] = $header->getLanguage();
        }

        return $languages;
    }
private function getLanguageValuesFromHeaders(array $headers): array
    {
        $languages = [];

        foreach ($headers as $header) {
            $languages[] = $header->getLanguage();
        }

        return $languages;
    }
Gets the language values from a list of headers

@param AcceptLanguageHeaderValue[] $headers The list of language headers
@return array The list of language values from the headers