src/vs/workbench/services/extensions/common/extensionHostManager.ts/ExtensionHostManager/_activateByEvent
class ExtensionHostManager:	private async _activateByEvent(activationEvent: string, activationKind: ActivationKind): Promise<void> {
		if (!this._proxy) {
			return;
		}
		const proxy = await this._proxy;
		if (!proxy) {
			// this case is already covered above and logged.
			// i.e. the extension host could not be started
			return;
		}
		return proxy.value.$activateByEvent(activationEvent, activationKind);
	}