assertEquals(
        TypeToken.of(Object.class),
        TypeToken.of(Types.supertypeOf(String.class)).getGenericSuperclass());
    assertEquals(
        new TypeToken<Object>() {},
        TypeToken.of(Types.supertypeOf(String[].class)).getGenericSuperclass());
    assertEquals(
        new TypeToken<Object>() {},
        TypeToken.of(Types.supertypeOf(CharSequence.class)).getGenericSuperclass());
  }

    assertEquals(
        TypeToken.of(Object.class),
        TypeToken.of(Types.supertypeOf(String.class)).getGenericSuperclass());
    assertEquals(
        new TypeToken<Object>() {},
        TypeToken.of(Types.supertypeOf(String[].class)).getGenericSuperclass());
    assertEquals(
        new TypeToken<Object>() {},
        TypeToken.of(Types.supertypeOf(CharSequence.class)).getGenericSuperclass());
  }

    // in which case we need to make sure the subclass's owner type is a subtype of the
    // supertype's owner.
    return Modifier.isStatic(((Class<?>) supertype.getRawType()).getModifiers())
        || supertype.getOwnerType() == null
        || isOwnedBySubtypeOf(supertype.getOwnerType());
  }

  private boolean isSubtypeOfArrayType(GenericArrayType supertype) {