// @@@ return values of {EXPAND|COLLAPS}ING event handler is discarded
event.SetEventType(bIsExpanded ? wxEVT_COMMAND_TREE_ITEM_EXPANDING
: wxEVT_COMMAND_TREE_ITEM_COLLAPSING);
GetEventHandler()->ProcessEvent(event);
// @@@ return values of {EXPAND|COLLAPS}ING event handler is discarded
event.SetEventType(bIsExpanded ? wxEVT_COMMAND_TREE_ITEM_EXPANDING
: wxEVT_COMMAND_TREE_ITEM_COLLAPSING);
GetEventHandler()->ProcessEvent(event);