!anything.isAssignableFrom(extendsTypeVar)
    }

    def "asSubtype"() {
        expect:
        ModelType.of(String).asSubtype(ModelType.of(String)) == ModelType.of(String)
        ModelType.of(String).asSubtype(ModelType.of(CharSequence)) == ModelType.of(String)
    }

    def "asSubtype failures"() {
        def extendsString = new ModelType<List<? extends String>>() {}.typeVariables[0]

        if (info == null) {
            context.add(ruleDefinition, String.format("Type '%s' is not a subtype of '%s'.", builtType.toString(), COMPONENT_SPEC_MODEL_TYPE.toString()));
            return null;
        }

        return new ExtractedTypeRule(ruleDefinition, info, builtType.asSubtype(info.baseInterface));
    }

     *
     * @throws ClassCastException if this cannot be cast as the subtype of the given type.
     * @throws IllegalStateException if this is a wildcard.
     * @throws IllegalArgumentException if the given type is a wildcard.
     */
    public <U> ModelType<? extends U> asSubtype(ModelType<U> modelType) {
        if (isWildcard()) {

      return notSubtype(arg); // isSubtype() currently incorrectly considers it a subtype.
    }
  }

  private static class WildcardSubtypingTests extends SubtypeTester {
    @TestSubtype(suppressGetSupertype = true, suppressGetSubtype = true)
    public Iterable<?> noBounds(List<?> list) {
      return isSubtype(list);
    }

      return notSubtype(arg); // isSubtype() currently incorrectly considers it a subtype.
    }
  }

  private static class WildcardSubtypingTests extends SubtypeTester {
    @TestSubtype(suppressGetSupertype = true, suppressGetSubtype = true)
    public Iterable<?> noBounds(List<?> list) {
      return isSubtype(list);
    }

    return create(AUDIO_TYPE, subtype);
  }

  /**
   * Creates a media type with the "font" type and the given subtype.
   *
   * @throws IllegalArgumentException if subtype is invalid
   */
  static MediaType createFontType(String subtype) {
    return create(FONT_TYPE, subtype);
  }

  /**
   * Creates a media type with the "image" type and the given subtype.
   *

    return create(AUDIO_TYPE, subtype);
  }

  /**
   * Creates a media type with the "font" type and the given subtype.
   *
   * @throws IllegalArgumentException if subtype is invalid
   */
  static MediaType createFontType(String subtype) {
    return create(FONT_TYPE, subtype);
  }

  /**
   * Creates a media type with the "image" type and the given subtype.
   *

      return errors::InvalidArgument("Invalid type '", type, "'");
    } else if (parts.size() == 3) {
      // First part is the type, second is the subtype
      ArrayInfo::SubTypeInfo subtype;
      TF_RETURN_IF_ERROR(HandleSubtype(parts[1], &subtype));
      info.subtypes.push_back(std::move(subtype));
    }
    if (!DataType_Parse(parts[0], &info.imported_dtype)) {
      return errors::FailedPrecondition(

            serializationProblem("Task `:notDeclared` of type `Broken`: cannot serialize object of type 'org.gradle.api.internal.artifacts.configurations.DefaultConfigurationContainer', a subtype of 'org.gradle.api.artifacts.ConfigurationContainer', as these are not supported with the...

    assertEquals("application", newType.type());
    assertEquals("yams", newType.subtype());
  }

  public void testCreateAudioType() {
    MediaType newType = MediaType.createAudioType("yams");
    assertEquals("audio", newType.type());
    assertEquals("yams", newType.subtype());
  }

  public void testCreateFontType() {
    MediaType newType = MediaType.createFontType("yams");