public void addTangoUserListener(ITangoUserListener listener, boolean stateless)
                throws DevFailed
    {
		event_listeners.add(ITangoUserListener.class, listener);
        event_identifier = subscribe_user_event(attr_name, filters, stateless);
    }
public void addTangoUserListener ( ITangoUserListener listener , boolean stateless ) throws DevFailed { event_listeners . add ( ITangoUserListener . class , listener ) ; event_identifier = subscribe_user_event ( attr_name , filters , stateless ) ; }
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