code: public void openElement(String name, String... attributes) {
      elementStack.push(name);
      startElement(name, attributes);
      println(">");
  
    }
docs: Open an XML element with the given name, and attributes. A call to closeElement() will output
  the appropriate XML closing tag. This class remembers the tag names.
  
  The String parameters are taken to be alternatively names and values. Any odd value
  at the end of the list is added as a valueless attribute.
  @param name Name of the element.
  @param attributes Attributes in name value pairs.