Hi poul,
With Modelio your code will be reversed (thanks to JavaDesigner )as a class, an operation, a parameter, a comment and that's all...
The body of the method will be reversed as the body of a UML comment owned by the operation (as depicted in my previous message) and not as some behavioural elements .
I never see an industrial tool reversing Java code in activity but if you know one's please tell me

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Hoping it is clear

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Regards,
BR