How do you reset a whole lesson?

Hi, I was wondering how I could reset a whole lesson since I stopped coding about four months ago and I have forgotten everything since. I know you can reset an individual exercise but can i reset the whole java course?
Thank you!

there is a help topic about this:

Java is part of the new course, you could reset it completely

javascript is part of the old courses, see the tricks in this help topic you could use

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