src/vs/workbench/services/extensions/common/extensionHostManager.ts/LazyStartExtensionHostManager/extensionTestsSendExit
class LazyStartExtensionHostManager:	public async extensionTestsSendExit(exitCode: number): Promise<void> {
		await this._startCalled.wait();
		const actual = await this._getOrCreateActualAndStart(`execute tests.`);
		return actual.extensionTestsSendExit(exitCode);
	}