code: public static ParticleSystem loadConfiguredSystem(File ref,
  			ConfigurableEmitterFactory factory) throws IOException {
        return loadConfiguredSystem(new FileInputStream(ref), factory, null, null);
  	}
docs: Load a set of configured emitters into a single system
  
  @param ref
  The XML file to read
  @return A configured particle system
  @param factory
  The factory used to create the emitter than will be poulated
  with loaded data.
  @throws IOException
  Indicates a failure to find, read or parse the XML file