Is there a way to log AWS Lambda response https handshake status?

I am serving an API using AWS Lambda with ALB in front to it.

@Overridepublic APIGatewayProxyResponseEvent handleRequest(APIGatewayProxyRequestEvent input,        Context context) {       ...       return responseEvent = new APIGatewayProxyResponseEvent(...);}

Is there a way to log if my Lambda function has successfully returned the HTTPs response to the client that makes the request? (I want to prove the response is received by the client.)