code: public static PropertiesLoader getPropertiesLoader() {
  		synchronized (PropertiesLoader.class) {
  			final ClassLoader classLoader = ConfigurableClassLoader.INSTANCE.getClassLoader();
  			PropertiesLoader loader = clMap.get(classLoader);
  			if (loader == null) {
  				try {
  					loader = new PropertiesLoader(MASTER_PLUGIN_FILE, EXTRA_PLUGIN_FILE);
  					clMap.put(classLoader, loader);
  				} catch (final IOException ex) {
  					throw new RuntimeException(ex);
  				}
  			}
  			return loader;
  		}
  	}
docs: Returns the PropertiesLoader singleton used by ROME to load plugin
  components.
  
  @return PropertiesLoader singleton.