empty_element.go
func newEmptyElement(ln *line, rslt *result, src *source, parent element, opts *Options) *emptyElement {
	return &emptyElement{
		elementBase: newElementBase(ln, rslt, src, parent, opts),
	}
}
func newEmptyElement(ln *line, rslt *result, src *source, parent element, opts *Options) *emptyElement {
	return &emptyElement{
		elementBase: newElementBase(ln, rslt, src, parent, opts),
	}
}
// newEmpty creates and returns an empty element.