if (runtimeType instanceof TypeVariable) {
      // First bound is always the super class, if one exists.
      return boundAsSuperclass(((TypeVariable<?>) runtimeType).getBounds()[0]);
    }
    if (runtimeType instanceof WildcardType) {
      // wildcard has one and only one upper bound.
      return boundAsSuperclass(((WildcardType) runtimeType).getUpperBounds()[0]);
    }

    AtomicReference<@Nullable Type> result = new AtomicReference<>();
    new TypeVisitor() {
      @Override
      void visitTypeVariable(TypeVariable<?> t) {
        result.set(subtypeOfComponentType(t.getBounds()));
      }

      @Override
      void visitWildcardType(WildcardType t) {
        result.set(subtypeOfComponentType(t.getUpperBounds()));
      }

      @Override

    assertEquals(String.class, typeVariable.getBounds()[0]);
  }

  public void testWithRecursiveBoundInTypeVariable() throws Exception {
    TypeVariable<?> typeVariable =
        (TypeVariable<?>) new WithGenericBound<String>() {}.getTargetType("withRecursiveBound");
    assertEquals(Types.newParameterizedType(Enum.class, typeVariable), typeVariable.getBounds()[0]);
  }

    assertEquals(String.class, typeVariable.getBounds()[0]);
  }

  public void testWithRecursiveBoundInTypeVariable() throws Exception {
    TypeVariable<?> typeVariable =
        (TypeVariable<?>) new WithGenericBound<String>() {}.getTargetType("withRecursiveBound");
    assertEquals(Types.newParameterizedType(Enum.class, typeVariable), typeVariable.getBounds()[0]);
  }

      @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);

    if (!Types.NativeTypeVariableEquals.NATIVE_TYPE_VARIABLE_ONLY) {
      assertEquals(actual.toString(), expected.hashCode(), actual.hashCode());
    }
    assertThat(actual.getBounds())
        .asList()
        .containsExactlyElementsIn(asList(expected.getBounds()))
        .inOrder();
  }

  /**
   * Working with arrays requires defensive code. Verify that we clone the type array for both input
   * and output.
   */

     */
    Type resolveInternal(TypeVariable<?> var, TypeTable forDependants) {
      Type type = map.get(new TypeVariableKey(var));
      if (type == null) {
        Type[] bounds = var.getBounds();
        if (bounds.length == 0) {
          return var;
        }
        Type[] resolvedBounds = new TypeResolver(forDependants).resolveTypes(bounds);
        /*

      @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);

    assertThat(typeArgs).hasLength(1);
    TypeVariable<?> captured = (TypeVariable<?>) typeArgs[0];
    assertThat(captured.getBounds()).asList().contains(Number.class);
    assertThat(captured.getBounds())
        .asList()
        .containsNoneOf(Object.class, new TypeToken<Iterable<Number>>() {}.getType());

    assertThat(typeArgs).hasLength(1);
    TypeVariable<?> captured = (TypeVariable<?>) typeArgs[0];
    assertThat(captured.getBounds()).asList().contains(Number.class);
    assertThat(captured.getBounds())
        .asList()
        .containsNoneOf(Object.class, new TypeToken<Iterable<Number>>() {}.getType());