src/Delta/Html/ListItem.php
public function parentTag(): ?string
    {
        switch ($this->attributes['list']) {
            case Options::ATTRIBUTE_LIST_ORDERED:
                return Options::HTML_TAG_LIST_ORDERED;
                break;
            case Options::ATTRIBUTE_LIST_BULLET:
                return Options::HTML_TAG_LIST_UNORDERED;
                break;

            default:
                return Options::HTML_TAG_LIST_UNORDERED;
                break;
        }
    }
public function parentTag(): ?string
    {
        switch ($this->attributes['list']) {
            case Options::ATTRIBUTE_LIST_ORDERED:
                return Options::HTML_TAG_LIST_ORDERED;
                break;
            case Options::ATTRIBUTE_LIST_BULLET:
                return Options::HTML_TAG_LIST_UNORDERED;
                break;

            default:
                return Options::HTML_TAG_LIST_UNORDERED;
                break;
        }
    }
public function parentTag ( ) : ? string { switch ( $ this -> attributes [ 'list' ] ) { case Options :: ATTRIBUTE_LIST_ORDERED : return Options :: HTML_TAG_LIST_ORDERED ; break ; case Options :: ATTRIBUTE_LIST_BULLET : return Options :: HTML_TAG_LIST_UNORDERED ; break ; default : return Options :: HTML_TAG_LIST_UNORDERED ; break ; } }
If the delta is a child, what type of tag is the parent

@return string|null
If the delta is a child what type of tag is the parent