src/vs/platform/undoRedo/common/undoRedoService.ts/WorkspaceStackElement/constructor
class WorkspaceStackElement:	constructor(actual: IWorkspaceUndoRedoElement, resourceLabels: string[], strResources: string[], groupId: number, groupOrder: number, sourceId: number, sourceOrder: number) {
		this.actual = actual;
		this.label = actual.label;
		this.confirmBeforeUndo = actual.confirmBeforeUndo || false;
		this.resourceLabels = resourceLabels;
		this.strResources = strResources;
		this.groupId = groupId;
		this.groupOrder = groupOrder;
		this.sourceId = sourceId;
		this.sourceOrder = sourceOrder;
		this.removedResources = null;
		this.invalidatedResources = null;
	}