[Question] Why not optimize Namespace's method ('addListeners') to support Collection

[damonxue]

Why not optimize Namespace's method ('addListeners') to support Collection.

@Override
    public void addListeners(Object listeners) {
        if(listeners instanceof Collection){
                 Collection<Object> list = (Collection)listeners;
                 list.stream.forEach( listener ->
                           addListeners(listener , listener.getClass());
                 );
                 return;
        }
        addListeners(listeners, listeners.getClass());
    }

    @Override
    public void addListeners(Object listeners, Class listenersClass) {
        engine.scan(this, listeners, listenersClass);
    }

[liangyuanpeng]

I believe that pr is welcome.