Set<String> s = disabledSubsystemsHolder.get( );
Set<String> s = data.get().disabledSubsystems;
    public static boolean removeDisabled(String id)    {    	Set<String> s = disabledSubsystemsHolder.get( );    	if ( s != null && id != null )    	{    		return s.remove(id);    	}    	return false;	    }