src/vs/base/browser/indexedDB.ts/IndexedDB/close
class IndexedDB:	close(): void {
		if (this.pendingTransactions.length) {
			this.pendingTransactions.splice(0, this.pendingTransactions.length).forEach(transaction => transaction.abort());
		}
		if (this.database) {
			this.database.close();
		}
		this.database = null;
	}