private Address getPreviewAddress(boolean forward) {
		AddressIterator addresses = addressSet.getAddresses(forward);
		Address address = addresses.next();
		while (getLayoutForAddress(address) == null) {
			address = addresses.next();
		}
		return address;
	}
Signals to rebuild this component's data model.  This call should not do any real work
if the model is not 'dirty'.
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/graph/vertex/ListingGraphComponentPanel.java