src/vs/platform/storage/common/storage.ts/InMemoryStorageService/constructor
class InMemoryStorageService:	constructor() {
		super();

		this._register(this.workspaceStorage.onDidChangeStorage(key => this.emitDidChangeValue(StorageScope.WORKSPACE, key)));
		this._register(this.profileStorage.onDidChangeStorage(key => this.emitDidChangeValue(StorageScope.PROFILE, key)));
		this._register(this.applicationStorage.onDidChangeStorage(key => this.emitDidChangeValue(StorageScope.APPLICATION, key)));
	}