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explicit wrapper class

 
Greenhorn
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Hi,

I'm trying to create a class like this:
and I need some variables in this class but this is not allowed according to jsoRestrictions its not possible:

"JSO classes cannot have instance fields. The fields would have no place to live in web mode. Programmers should instead make an explicit wrapper class and put the fields there."

What is explicit wrapper class and how to use it?

Thank you for your help!
 
Consider Paul's rocket mass heater.
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