code: public ActivityHandle getActivityHandle(Object activity) {
  		if (activity instanceof Wrapper) {
  			final Wrapper w = (Wrapper) activity;
  			if (w.getRa() == this) {
  				return w.getActivityHandle();
  			}			
  		}
  		return null;		
  	}
docs: /*
  (non-Javadoc)
  @see javax.slee.resource.ResourceAdaptor#getActivityHandle(java.lang.Object)