private VerticalChoicesPanel getVerticalConflictPanel() {
		if (conflictPanel == null) {
			conflictPanel = new VerticalChoicesPanel();
			currentConflictPanel = conflictPanel;
			conflictPanel.setTitle("Reference");
		}
		else {
			conflictPanel.clear();
		}
		return conflictPanel;
	}
Replace the fallthroughs where possible. 
@param addressSet the address set where fallthroughs should be replaced
@param chosenConflictOption indicator of where to get references from (KEEP_ORIGINAL, KEEP_LATEST, KEEP_MY).
@param monitor task monitor
@throws CancelledException if user cancels.
Ghidra/Features/Base/src/main/java/ghidra/app/merge/listing/ReferenceMerger.java