static new ThreadLocal<Bool> evalJava_prep_voidMagic; // set to false to avoid looking up standard function return types

static LS evalJava_prePrep(S code, EvalJavaPrep prep default new) {

  LS tok = javaTok(trim(code));

  int idx;

  while ((idx = jfind(tok, "global {")) >= 0) {

    int j = findEndOfBracketPart(tok, idx+2);

    prep.global.add(joinSubList(tok, idx+3, j-1));

    clearTokens_reTok(tok, idx, j+1);

  }

  // =1*2 as in Lua

  if (eqGet(tok, 1, "=")) tok = subList(tok, 2);

  // if code is something like "sclass Bla {}", just return as is

  if (tok_isStaticLevelCode(tok))

    ret tok;

  if (!isFalse(evalJava_prep_voidMagic!) && tok_shouldAddReturn(tok) && eqGet(tok, 3, "(") && isIdentifier(get(tok, 1)) && isKnownVoidFunction_uncached(get(tok, 1)))

    tokAppend_reTok(tok, l(tok)-2, ";");

  S name = null;

  ifdef evalJava_prePrep_debug

    printVars evalJava_prePrep(+tok);

  endifdef

  // just a single identifier: interpret as function call

  if (l(tok) == 3 && isIdentifier(name = firstToken(tok)))

    tokAppend_reTok(tok, 1, "()" + (isKnownVoidFunction_uncached(name) ? ";" : ""));

  ifdef evalJava_prePrep_debug

    printVars evalJava_prePrep(+name, +tok);

  endifdef

  ret tok;

}