Show/Hide facet values in CubeGrid

[mingjiansong]

SmartGWTEE 2.5, GWT 2.4, IE 8

While playing with the CubeGrid widget on SmartGWTEE showcase, I noticed that the user can right click on a header cell and from the popup menu, selectively hide or show facet values. (See attachment).

What is the API call to achieve this behavior? Is there some way for the client code to listen to such events when a facet value becomes visible or hidden?

[Isomorphic]

These don't currently have documented programmatic equivalents. For the adventurous, the (unsupported) APIs are show/hideFacetValue(facetId, faceValueId) and show/hideFacetValues(facetValueMap).

[addy_hu]

I also need some way to catch this visible changes in order to save it in the user preference.
Hope that there will have some way to listen to such events.