protected void verifyEdge(FGVertex start, FGVertex destination) {
		FGData data = getFunctionGraphData();
		FunctionGraph functionGraph = data.getFunctionGraph();
		Graph<FGVertex, FGEdge> graph = functionGraph;

		FGEdge edge = graph.findEdge(start, destination);
		assertNotNull("No edge exists for vertices: " + start + "   and   " + destination, edge);
	}
Finds an edge that represents the given edge, which may no longer exist with
the same (==) edge instances.
Ghidra/Features/FunctionGraph/src/test.slow/java/ghidra/app/plugin/core/functiongraph/AbstractFunctionGraphTest.java