src/vs/platform/storage/browser/storageService.ts/IndexedDBStorageDatabase/updateItems
class IndexedDBStorageDatabase:	async updateItems(request: IUpdateRequest): Promise<void> {
		this.pendingUpdate = this.doUpdateItems(request);
		try {
			await this.pendingUpdate;
		} finally {
			this.pendingUpdate = undefined;
		}
	}