src/vs/platform/files/browser/indexedDBFileSystemProvider.ts/IndexedDBFileSystemProvider/triggerChanges
class IndexedDBFileSystemProvider:	private triggerChanges(changes: IFileChange[]): void {
		if (changes.length) {
			this._onDidChangeFile.fire(changes);

			// remove previous changes so that event is triggered even if new changes are same as old changes
			window.localStorage.removeItem(this.changesKey);
			window.localStorage.setItem(this.changesKey, JSON.stringify(changes));
		}
	}