public void setGroupHistory(Collection<GroupHistoryInfo> history) {
		this.groupHistorySet = new HashSet<>(history);
		for (GroupHistoryInfo info : history) {
			Set<FGVertex> infoVertices = info.getVertices();
			notifyVerticesOfGroupAssociation(infoVertices, info);
		}
	}
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