What is class/file that handles the `gradle --help` command output?

In Gradle when the gradle --help command is executed, it shows an output how is excepted

That output from where does come from the Github - Gradle source code?

I tried with the Go to file button with the help term, but I couldn’t find the correct file. So I want to know from where does come from the output in case in the future is need add a new parameter, delete or other thing.

Thank you