Mark a private variable as used to prevent compiler from removing it

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Here’s a code example:
https://rescript-lang.org/try?code=KTAOCcEsDcEMBcCmAKANo+ACCMGIGqziYC8mARAEZHkCUAUOljnEoeAGLgD2AtgEqwA7qUzBww5ORZ52dIA
How can I mark the privateVar as used so that it can be accessed from the %raw()?

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Interesting question. This isn’t an answer, but you get the same behavior (playground) if you shadow the original binding that you get in your example that uses private.

Edit: Also, if you make it private with an explicit module interface…

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The recommended practice is make your raw a self contained function, and pass environments though arguments. Raw is pretty unsafe now, you don’t want to make it even more dangerous.