svoid tok_reImmutableVars(LS tok) {
  jreplace_any_dyn(tok, ll("reImmutable <id>;", "reimmutable <id>;"), (_tok, i) -> {
    S var = _get(tok, i);
    S var2 = makeVar(var);
    ret "var \*var2*/ = \*var*/; replace \*var*/ with \*var2*/.";
  });
}