code: public static Element writeMapElement(MapElement primitive, XMLBuilder builder, XMLResources resources) throws IOException {
  		return writeMapElement(primitive, null, builder, resources);
  	}
docs: Write the XML description for the given map element.
  
  @param primitive is the map element to output.
  @param builder is the tool to create XML nodes.
  @param resources is the tool that permits to gather the resources.
  @return the XML node of the map element.
  @throws IOException in case of error.