code: public static ParticleSystem loadConfiguredSystem(InputStream ref,
  			ConfigurableEmitterFactory factory) throws IOException {
              return loadConfiguredSystem(ref, factory, null, null);
           }
docs: Load a set of configured emitters into a single system
  
  @param ref
  The stream to read the XML from
  @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