please include function allClasses.

sS getClassDeclarationName(L<S> tok) {
  if (tok != null)
    for (int i = 1; i+2 < tok.size(); i += 2)
      if (allClasses_keywords.contains(tok.get(i)) && isIdentifier(tok.get(i+2))) {
        while (contains(getClassDeclarationName_skippables(), get(tok, i+2)))
          i += 2;
        ret tok.get(i+2);
      }
  null;
}