// probably better than findTranslators (uses tokens)
// removes invocations from src
static S findTranslators2(S src, L<S> libsOut) {
  L<S> tok = javaTok(src);
  int i;
  while ((i = jfind(tok, "!<int>")) >= 0) {
    setAdd(libsOut, tok.get(i+2));
    clearTokens(tok, i, i+3);
  }
  ret join(tok);
}