@Override
      void visitParameterizedType(ParameterizedType t) {
        visit(t.getActualTypeArguments());
      }

      @Override
      void visitTypeVariable(TypeVariable<?> t) {
        visit(t.getBounds());
      }
    }.visit(type);
  }

  private static void assertVisited(Type type) {
    TypeVisitor visitor = new BaseTypeVisitor();
    try {
      visitor.visit(type);
      fail("Type not visited");

    final String name;
    final List<Type> bounds;

    TypeParameterSignature(TypeVariable<?> typeParameter) {
      name = typeParameter.getName();
      bounds = asList(typeParameter.getBounds());
    }

    @Override
    public boolean equals(@Nullable Object obj) {
      if (obj instanceof TypeParameterSignature) {
        TypeParameterSignature other = (TypeParameterSignature) obj;
        /*

    final String name;
    final List<Type> bounds;

    TypeParameterSignature(TypeVariable<?> typeParameter) {
      name = typeParameter.getName();
      bounds = asList(typeParameter.getBounds());
    }

    @Override
    public boolean equals(@Nullable Object obj) {
      if (obj instanceof TypeParameterSignature) {
        TypeParameterSignature other = (TypeParameterSignature) obj;
        /*