code: public void addComment(String comment) throws IOException {
  		prepareToAddChildNode();
  		SXCommentNode commentNode = new SXCommentNode(comment, writer, 0, tabString);
  		lastChildNode = commentNode;
  	}
docs: Adds a comment to this document.
  <b>WARNING:</b> This will close the last added tag, if applicable!
  
  @param comment The comment line to be added.