code: private ContentElement parseContentElement(SpanManager sm,
  			ContentElementParsingParameters cepp, Span lineSpan)
  	{
  		LinkedList<Span> lineSpans = new LinkedList<Span>();
  		lineSpans.add(lineSpan);
  		return parseContentElement(sm, cepp, lineSpans, new ContentElement());
  	}
docs: Building a ContentElement from a single line.