private Address getChangedAddress(DomainObjectChangeRecord changeRecord) {
		if (changeRecord instanceof ProgramChangeRecord) {
			return ((ProgramChangeRecord) changeRecord).getStart();
		}

		return null;
	}
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