src/vs/workbench/services/extensions/common/extensionHostManager.ts/LazyStartExtensionHostManager/activate
class LazyStartExtensionHostManager:	public async activate(extension: ExtensionIdentifier, reason: ExtensionActivationReason): Promise<boolean> {
		await this._startCalled.wait();
		if (this._actual) {
			return this._actual.activate(extension, reason);
		}
		return false;
	}