gs.addInfoMessage is not working on Declarative List Action in workspace view.

[Ganeshm1]

Hello All, 

I have created a simple List Action for the Hardware Asset workspace to update asset records on list view. 
Update is working as expected but info message is not appearing upon update. Any idea on this? 

 Code: 

current.gl_account = 'test';
current.update();
gs.addInfoMessage('update successful');

Thanks in advance. 

Ganesh