static Set<S> tok_allIdentifiersWithoutColonEquals(S s) {
  new HashSet<S> set;
  ret tok_allIdentifiersWithoutColonEquals(javaTok(s));
}
  
static Set<S> tok_allIdentifiersWithoutColonEquals(LS tok) {
  new HashSet<S> set;
  tok = codeTokens(tok);
  for i over tok: {
    S t = tok.get(i);
    if (isIdentifier(t) && !
      (eqGet(tok, i+1, ":") && eqGet(tok, i+2, "=")))
      set.add(t);
  }
  ret set;
}