void onSelectionChanged(SelectionEvent event)
NOTE: For updating other components based on selections or
triggering selection-oriented events within an application, see the
selectionUpdated() event which is likely more suitable.
getSelection() from within this event may not
return a valid set of selected records if the event has been triggered by a call to
deselectAllRecords() - in this case use the
selectionUpdated() event instead.
event- the event