private void fireUserChoiceMade(List<T> selectedItems) {
		for (DropDownMultiSelectionChoiceListener<T> listener : choiceListeners) {
			listener.selectionChanged(selectedItems);
		}
	}
Notifies subscribers when the list selection has changed.

@param selectedItems the list of selected items
Ghidra/Framework/Docking/src/main/java/docking/widgets/DropDownMultiSelectionTextField.java