GWT：弹出窗口阻止程序阻止RPC后打开窗口

Hi I have a following code:

嗨，我有以下代码：

    button.addClickHandler( new ClickHandler( ) {
        @Override   
        public void onClick( ClickEvent event ) {    
             Call 1 --> Window.open( publicBookingUrl, "_blank", null );                
            dispatcher.execute( new HasServicesAction(true), 
                    new ActionCallback<SomeResult>( ){       
                @Override 
                public void onSuccess( SomeResult result ) {
             Call 2 --> Window.open( publicBookingUrl, "_blank", null );
                } 
            });  
        }        
    });
    b