src/vs/workbench/contrib/experiments/common/experimentService.ts/ExperimentService/markAsCompleted
class ExperimentService:	public markAsCompleted(experimentId: string): void {
		const storageKey = 'experiments.' + experimentId;
		const experimentState: IExperimentStorageState = safeParse(this.storageService.get(storageKey, StorageScope.GLOBAL), {});
		experimentState.state = ExperimentState.Complete;
		this.storageService.store(storageKey, JSON.stringify(experimentState), StorageScope.GLOBAL, StorageTarget.MACHINE);
	}