The Right Way To Implement A Log Listener

I am going to show you the right way to implement a log listener using Google’s wrong way to do, as some at Google are extremely lazy.

Log Listener, The Wrong Way

So let’s see an example of a log listener implemented the wrong way:

And that is from the Go Router package examples:

packages/nav_observer.dart at main · flutter/packages

So what is wrong? Well, let me show you:

That e is not error, as it’s e for log event. The problem is it’s not enough details of the log event and in the case of an error the is no way to get…