public static <V, E extends GEdge<V>> GraphNavigator<V, E> topDownNavigator() {
		return new GraphNavigator<>(true);
	}
Creates a top-down navigator, which is one that traverses the graph from the source
to the sink.

@return the navigator
Ghidra/Framework/Graph/src/main/java/ghidra/graph/algo/GraphNavigator.java