src/vs/workbench/services/views/common/viewContainerModel.ts/ViewContainerModel/compareViewDescriptors
class ViewContainerModel:	private compareViewDescriptors(a: IViewDescriptorItem, b: IViewDescriptorItem): number {
		if (a.viewDescriptor.id === b.viewDescriptor.id) {
			return 0;
		}

		return (this.getViewOrder(a) - this.getViewOrder(b)) || this.getGroupOrderResult(a.viewDescriptor, b.viewDescriptor);
	}