private FGVertex getVertex(VisualGraph<FGVertex, FGEdge> jungGraph, Address address) {
		Collection<FGVertex> vertices = jungGraph.getVertices();
		for (FGVertex v : vertices) {
			if (v.containsAddress(address)) {
				return v;
			}
		}

		// this is unusual; can happen if the program is being changed while this is running
		// throw new AssertException("Cannot find vertex for address: " + address);
		Msg.debug(this, "Unable to find vertex for address; has the program changed?: " + address);
		return null;
	}
An amount by which edges entering a vertex from the left are offset to avoid overlapping
Ghidra/Features/FunctionGraphDecompilerExtension/src/main/java/ghidra/app/plugin/core/functiongraph/graph/layout/DecompilerNestedLayout.java