src/vs/platform/files/browser/indexedDBFileSystemProvider.ts/IndexedDBFileSystemProvider/deleteKeys
class IndexedDBFileSystemProvider:	private async deleteKeys(keys: string[]): Promise<void> {
		if (keys.length) {
			await this.indexedDB.runInTransaction(this.store, 'readwrite', objectStore => keys.map(key => objectStore.delete(key)));
		}
	}