public GroupHistoryInfo getGroupHistory(FGVertex vertex) {
		return vertex.getGroupInfo();
	}
Returns history objects that represent previously grouped vertices and their description.

@param vertex the vertex for which to check group belonging
@return history objects that represent previously grouped vertices and their description.
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/graph/FunctionGraph.java