How to find the instance which raised the event?

Hi all,

I am coding program using cl_gui_alv_grid, with drill down. I am trying to capture the double_click event. I know can do it by setting diff handlers for each alv object. But is there any way I can set one handler for all the list and in the event receiver method I can find which instance (alv list) raised the double_click event?

Ravi