src/vs/workbench/services/extensions/common/extensionHostManager.ts/ExtensionHostManager/extensionTestsExecute
class ExtensionHostManager:	public async extensionTestsExecute(): Promise<number> {
		const proxy = await this._getProxy();
		if (!proxy) {
			throw new Error('Could not obtain Extension Host Proxy');
		}
		return proxy.$extensionTestsExecute();
	}