@TestSubtype(suppressGetSupertype = true, suppressGetSubtype = true)
    public UseList<? extends List<Enum<? extends Enum<?>>>>
        wildcardBoundUsesImplicitlyRecursiveBoundedWildcard(UseList<? extends List<Enum<?>>> arg) {
      return isSubtype(arg);
    }

    @TestSubtype(suppressGetSupertype = true, suppressGetSubtype = true)
    public UseList<? extends List<Enum<? extends Enum<?>>>>

    @TestSubtype(suppressGetSupertype = true, suppressGetSubtype = true)
    public UseList<? extends List<Enum<? extends Enum<?>>>>
        wildcardBoundUsesImplicitlyRecursiveBoundedWildcard(UseList<? extends List<Enum<?>>> arg) {
      return isSubtype(arg);
    }

    @TestSubtype(suppressGetSupertype = true, suppressGetSubtype = true)
    public UseList<? extends List<Enum<? extends Enum<?>>>>

    }

    /**
     * @throws Exception
     */
    public void testIsExist() throws Exception {
        assertEquals("1", true, ResourceUtil.isExist("CLMessages.properties"));
        assertEquals("2", false, ResourceUtil.isExist("hoge"));
    }

    /**
     * @throws Exception
     */
    public void testGetExtension() throws Exception {

     *            The resource path. Must not be {@literal null} or empty string.
     * @return {@literal true} if the resource exists
     * @see #getResourceNoException(String)
     */
    public static boolean isExist(final String path) {
        assertArgumentNotEmpty("path", path);

        return getResourceNoException(path) != null;
    }

    /**
     * Loads and returns a properties file from the context class loader.

        for (final String[] call : testClient.addMappingCalls) {
            assertNotNull(call);
        }
        // The loadBulkData=true path triggers getResourcePath + ResourceUtil.isExist checks.
        // In test environment resource files don't exist, so insertBulkData won't be called,
        // but the overall flow should still succeed.
        assertTrue(testClient.calledMethods.contains("addMapping"));

                    final String dataPath =
                            getResourcePath(indexConfigPath, fessConfig.getFesenType(), "/" + configIndex + "/" + configType + ".bulk");
                    if (ResourceUtil.isExist(dataPath)) {
                        insertBulkData(fessConfig, indexName, dataPath, true);
                    }