// We assume all elements of the replacements array are just identifiers
// (or similarly simple) so there is no tokenization conflict
// between javaTok and javaTokForStruct
sS structWithReplacements(O object, S... replacements) {
  S s = struct(object);
  LS tok = javaTokForStruct(s);
  bool change;
  for (int i = 0; i < l(replacements); i += 2)
    if (jreplace(tok, replacements[i], replacements[i+1]))
      set change;
  ret change ? join(tok) : s;
}