public function addContent($name, $content, $options = [])
    {
        $multiPartContent = $this->getContent();
        if (!is_array($multiPartContent)) {
            $multiPartContent = [];
        }
        $options['content'] = $content;
        $alias = $this->generateContentAlias($name);
        $this->addAliasToContentMap($name, $alias);
        $multiPartContent[$alias] = $options;
        $this->setContent($multiPartContent);
        return $this;
    }