src/vs/workbench/services/extensions/common/abstractExtensionService.ts/AbstractExtensionService/_activateByEvent
class AbstractExtensionService:	private _activateByEvent(activationEvent: string, activationKind: ActivationKind): Promise<void> {
		const result = Promise.all(
			this._extensionHostManagers.map(extHostManager => extHostManager.activateByEvent(activationEvent, activationKind))
		).then(() => { });
		this._onWillActivateByEvent.fire({
			event: activationEvent,
			activation: result
		});
		return result;
	}