src/vs/platform/undoRedo/common/undoRedoService.ts/ResourceStackElement/constructor
class ResourceStackElement:	constructor(actual: IUndoRedoElement, resourceLabel: string, strResource: string, groupId: number, groupOrder: number, sourceId: number, sourceOrder: number) {
		this.actual = actual;
		this.label = actual.label;
		this.confirmBeforeUndo = actual.confirmBeforeUndo || false;
		this.resourceLabel = resourceLabel;
		this.strResource = strResource;
		this.resourceLabels = [this.resourceLabel];
		this.strResources = [this.strResource];
		this.groupId = groupId;
		this.groupOrder = groupOrder;
		this.sourceId = sourceId;
		this.sourceOrder = sourceOrder;
		this.isValid = true;
	}