protected GroupedFunctionGraphVertex regroup(FGVertex vertex) {

		DockingActionIf regroupAction = getRegroupAction(vertex);
		if (regroupAction == null) {
			Assert.fail("Did not find the regroup action on vertex: " + vertex.getTitle());
		}
		performAction(regroupAction, false);
		waitForBusyGraph();

		FGController controller = getFunctionGraphController();
		FGData data = controller.getFunctionGraphData();
		FunctionGraph fg = data.getFunctionGraph();
		return getGroupVertex(fg, vertex.getAddresses().getMinAddress());
	}
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