src/vs/base/common/observableImpl/base.ts/TransactionImpl/finish
class TransactionImpl:	public finish(): void {
		const updatingObservers = this.updatingObservers!;
		// Prevent anyone from updating observers from now on.
		this.updatingObservers = null;
		for (const { observer, observable } of updatingObservers) {
			observer.endUpdate(observable);
		}
	}