public function getMetaHeaders()
    {
        if ($this->offsetExists('meta') && is_array($this->meta)) {
            $meta = $this->meta;
        } else {
            $meta = [];
        }
        if (!array_key_exists('Content-Type', $meta)) {
            $meta['Content-Type'] = 'text/html;charset=UTF-8';
        }

        // Remove null/empty values, this allow you to remove the Content-Type by making it empty.
        return array_filter($meta);
    }