dispatchSelectionEvent abstract method Null safety
- SelectionEvent event
Handles the SelectionEvent sent to this object.
The subclasses need to update their selections or delegate the SelectionEvents to their subtrees.
events are subclasses of SelectionEvent. Check
SelectionEvent.type to determine what kinds of event are dispatched to
this handler and handle them accordingly.
- SelectionEventType, which contains all of the possible types.
SelectionResult dispatchSelectionEvent(SelectionEvent event);