As shown in pragmagic/karax#67 using `this` as parameter name made the
codegen output wrong code (and the user didn't notice the errors in the
browser console).
This fix was necessary in order to fix the lambda lifting used in
the "jsffi" module, which relies on turning nkStmtList into nkLambda
in a catch-all dot operator.
* All JavaScript operators are usable with JsObject
* The dot operators will use native JavaScript strings
* Results returned from dot calls are consired discardable
