public function getResponseHeaders()
    {
        if ($this->offsetExists('headers') && is_array($this->headers)) {
            $headers = $this->headers;
        } else {
            $headers = [];
        }
        if (!array_key_exists('X-UA-Compatible', $headers)) {
            $headers['X-UA-Compatible'] = 'IE=edge,chrome=1';
        }

        // Remove null/empty values, this allow you to remove the X-UA-Compatible by making it empty.
        return array_filter($headers);
    }