code: final String getMESubUserId()
    {
  	if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
  	{
  	  SibTr.entry(tc, "getMESubUserId");
  	  SibTr.exit(tc, "getMESubUserId", _meSubUserId);
  	}
  
  	return _meSubUserId;
    }
docs: Returns the value of the userid associated with the subscription.
  
  @return The userid.