static LS tok_makeArgumentsToAllFunctionsFinal(LS tok) {
  bool change = false;
  for (LS tokF : findFullFunctionDefs(tok, true)) {
    IntRange r = tok_findArgs(tokF);
    if (r == null) continue;
    //print("Args: " + subList(tokF, r));
    Map<Int> bracketMap = getBracketMapIncludingAngleBrackets(tokF);
    int i = r.start+1;
    while (i < r.end-2) {
      if (neqGet(tokF, i, "final")) { tokPrepend(tokF, i, "final "); set change; }
      while (i < r.end && neqGet(tokF, i, ","))
        i = or(bracketMap.get(i), i)+2;
      i += 2;
    }
  }
  if (change) reTok(tok);
  ret tok;
}

sS tok_makeArgumentsToAllFunctionsFinal(S s) {
  ret join(tok_makeArgumentsToAllFunctionsFinal(javaTok(s)));
}

Began life as a copy of #1019709