Akhil Vijayan explains Scala Clippy:
Now you may be wondering how these errors are identified and we get advice related to it.
Simple, these are provided by the Scala community. If you visit their official website Scala Clippy where you can find a tab “Contribute”. Under that, we can post our own errors. These errors are parsed first, and when successful we can add our advice which will be reviewed and if accepted it will be added to their database which will, in turn, be beneficial to others.
Take a close look at the screenshots; I missed it at first, but there’s helpful advice above the error message.