new BaseTypeVisitor() {
      @Override
      void visitParameterizedType(ParameterizedType t) {}
    }.visit(type);
  }

  public <E extends Enum<E>> void testVisitRecursiveTypeBounds() {
    Type type = new TypeCapture<EnumSet<E>>() {}.capture();
    assertVisited(type);
    new BaseTypeVisitor() {
      @Override
      void visitParameterizedType(ParameterizedType t) {
        visit(t.getActualTypeArguments());

 * example, this can be used to reject wildcards or type variables contained in a type as in:
 *
 * <pre>{@code
 * new TypeVisitor() {
 *   protected void visitParameterizedType(ParameterizedType t) {
 *     visit(t.getOwnerType());
 *     visit(t.getActualTypeArguments());
 *   }
 *   protected void visitGenericArrayType(GenericArrayType t) {
 *     visit(t.getGenericComponentType());

    new BaseTypeVisitor() {
      @Override
      void visitParameterizedType(ParameterizedType t) {}
    }.visit(type);
  }

  public <E extends Enum<E>> void testVisitRecursiveTypeBounds() {
    Type type = new TypeCapture<EnumSet<E>>() {}.capture();
    assertVisited(type);
    new BaseTypeVisitor() {
      @Override
      void visitParameterizedType(ParameterizedType t) {
        visit(t.getActualTypeArguments());

        }
        for (int i = 0; i < fromLowerBounds.length; i++) {
          populateTypeMappings(mappings, fromLowerBounds[i], toLowerBounds[i]);
        }
      }

      @Override
      void visitParameterizedType(ParameterizedType fromParameterizedType) {
        if (to instanceof WildcardType) {
          return; // Okay to say Foo<A> is <?>
        }

      }

      @Override
      void visitWildcardType(WildcardType type) {
        visit(type.getLowerBounds());
        visit(type.getUpperBounds());
      }

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

      @Override
      void visitGenericArrayType(GenericArrayType type) {