public boolean inheritsFromLibraryClass(JvmClass cls) {
    for (String st : cls.getSuperTypes()) {
      Iterator<JvmClass> classes = getClassesByName(st).iterator();
      if (!classes.hasNext()) {
        // the supertype is not present in the graph (not compiled yet?), assuming this is a library class
        return true;
      }
      while (classes.hasNext()) {
        if (inheritsFromLibraryClass(classes.next())) {
          return true;
        }
      }
    }
    return false;
  }
public boolean inheritsFromLibraryClass(JvmClass cls)