scriptEngineFactory.add("testEngine", engine);

        // Verify engine is accessible by name
        ScriptEngine retrieved = scriptEngineFactory.getScriptEngine("testengine");
        assertNotNull(retrieved);
        assertEquals(engine, retrieved);

        // Verify engine is accessible by class simple name
        ScriptEngine retrievedByClass = scriptEngineFactory.getScriptEngine("testscriptengine");

            assertTrue("Constructor should be private", java.lang.reflect.Modifier.isPrivate(constructor.getModifiers()));

            // Test that constructor is accessible when made accessible
            constructor.setAccessible(true);
            SystemUtil instance = constructor.newInstance();
            assertNotNull(instance);

        exceptionClass);
    checkArgument(
        hasConstructorUsableByGetChecked(exceptionClass),
        "Futures.getChecked exception type (%s) must be an accessible class with an accessible "
            + "constructor whose parameters (if any) must be of type String and/or Throwable",
        exceptionClass);
  }

  private FuturesGetChecked() {}

     * @throws IllegalAccessRuntimeException
     *             If this {@link Method} object enforces Java language access control and the underlying method is not accessible
     * @throws InvocationTargetRuntimeException
     *             If the underlying method throws an exception
     * @see Method#invoke(Object, Object[])
     */
    @SuppressWarnings("unchecked")

        exceptionClass);
    checkArgument(
        hasConstructorUsableByGetChecked(exceptionClass),
        "Futures.getChecked exception type (%s) must be an accessible class with an accessible "
            + "constructor whose parameters (if any) must be of type String and/or Throwable",
        exceptionClass);
  }

  private FuturesGetChecked() {}

            assertTrue("Constructor should be private", java.lang.reflect.Modifier.isPrivate(constructor.getModifiers()));

            // Test that constructor is accessible when made accessible
            constructor.setAccessible(true);
            WebApiUtil instance = constructor.newInstance();
            assertNotNull(instance);

        byte[] data = "test content".getBytes();
        ContentCache cache = new ContentCache(data);

        response.setContentCache(cache);

        // ContentCache is not directly accessible, but we can test through content methods
        assertNotNull(response);
    }

    @Test
    public void testGetContentAsStringWithCache() throws IOException {
        CurlResponse response = new CurlResponse();

            assertTrue("Constructor should be private", java.lang.reflect.Modifier.isPrivate(constructor.getModifiers()));

            // Test that constructor is accessible when made accessible
            constructor.setAccessible(true);
            KuromojiCSVUtil instance = constructor.newInstance();
            assertNotNull(instance);

            assertTrue("Constructor should be protected", java.lang.reflect.Modifier.isProtected(constructor.getModifiers()));

            // Test that constructor is accessible when made accessible
            constructor.setAccessible(true);
            ThreadDumpUtil instance = constructor.newInstance();
            assertNotNull(instance);

 * old Android Ice Cream Sandwich release), then this class throws an exception instead of creating
 * a file or directory that would be more accessible.
 */
@J2ktIncompatible
@GwtIncompatible
@J2ObjCIncompatible
abstract class TempFileCreator {
  static final TempFileCreator INSTANCE = pickSecureCreator();

  /**