Animation on add/delete/expand/collapse rows

Hello,
I’m trying to add animations to row actions. Is it possible to use the current grid events to add animations to row manipulations?

For example, when expanding a tree node, having the child nodes slide into view. Or, when adding a row, having the new row fade into view.

Similar to this:
dev.sencha.com/deploy/ext-4.1.0- … egrid.html

Unfortunately such feature is not supported.