static S replaceCodeTokensUsingMap_curly(S s, SS map) {
  ret join(replaceCodeTokensUsingMap_curly(javaTok(s), map);
}

static LS replaceCodeTokensUsingMap_curly(LS tok, SS map) {
  LS out = emptyList(tok);
  for i over tok: {
    out.add(odd(i) ? lookupOrKeep_curly(map, tok.get(i)) : tok.get(i));
  }
  ret out;
}

sS replaceCodeTokensUsingMap_curly(SS map, S s) {
  ret replaceCodeTokensUsingMap_curly(s, map);
}

Began life as a copy of #1014558