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[GRID] On row expand/collapse callbacks

When using subrows in grid, is there any way to catch those events? I mean expanding the row and collapsing the row?
Sth like onRowExpanded & onRowCollapsed

There is no such event in current version 
http://dhtmlx.com/docs/products/kb/index.shtml?cat=search&page=1&q=2989&ssr=yes&s=_expandMonolite