@Override
	protected void notifyGroupChange() {
		if (isRegroupOperation) {
			functionGraph.groupRestored(groupVertex);
		}
		else {
			functionGraph.groupAdded(groupVertex);
		}
	}
Constructor - used when updating an existing group

@param controller the controller of the graph to be ungrouped
@param groupVertex The group vertex to be ungrouped
@param verticesToGroup the vertices to combine into a group
@param useAnimation whether to use animation
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/util/job/GroupVertexFunctionGraphJob.java