@Override
	public Icon getIcon() {
		if (isConnected()) {
			return super.getIcon();
		}

		if (navigatableIcon == null) {
			Icon primaryIcon = super.getIcon();
			navigatableIcon = NavigatableIconFactory.createSnapshotOverlayIcon(primaryIcon);
		}
		return navigatableIcon;
	}
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