public void groupVertices(FGController controller, String groupVertexText,
			Set<FGVertex> groupedVertices, Point2D groupVertexLocation) {

		groupVertices(controller, groupVertexText, groupedVertices, groupVertexLocation, false);
	}
Checks each vertex in the given set to see if it is a group vertex.  If so, this method
will check to see if the group is still in the graph.  If not, assume that it has been
uncollapsed and find it's children (recursively) and add them to the set to be regrouped,
replacing that original group.

@param graph the graph containing all vertices
@param fixupVertices the vertices to examine
Ghidra/Features/FunctionGraph/src/main/java/ghidra/graph/viewer/FGViewUpdater.java