private void handleSymbolRenamed(DomainObjectChangedEvent ev) {
		for (int i = 0; i < ev.numRecords(); i++) {
			DomainObjectChangeRecord record = ev.getChangeRecord(i);
			EventType eventType = record.getEventType();
			if (eventType == ProgramEvent.SYMBOL_RENAMED) {
				Address address = getChangedAddress(record);
				if (address != null) {
					controller.refreshDisplayForAddress(address);
				}
			}
		}
	}
Returns true when something destructive has happened to the data upon which the graph has
created, like a memory block move.
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/FGProvider.java