https://www-demos.smartclient.com/smartgwtee-latest/javadoc/com/smartgwt/client/widgets/grid/events/RecordCollapseHandler.html
RecordCollapseHandler (Smart GWT EE API 15.0d (2026-05-09))
declaration: package: com.smartgwt.client.widgets.grid.events, interface: RecordCollapseHandler
smartgwteeapi