src/vs/base/parts/storage/common/storage.ts/InMemoryStorageDatabase/updateItems
class InMemoryStorageDatabase:	async updateItems(request: IUpdateRequest): Promise<void> {
		if (request.insert) {
			request.insert.forEach((value, key) => this.items.set(key, value));
		}

		if (request.delete) {
			request.delete.forEach(key => this.items.delete(key));
		}
	}