// Arrange: stub renew() to return a mocked CredentialsInternal
        when(renewable.renew()).thenReturn(returned);

        // Act: invoke renew()
        CredentialsInternal result = renewable.renew();

        // Assert: verify interaction and returned value
        verify(renewable, times(1)).renew();

EOF
```

Upload this object to the bucket via `mc cp`
```
mc cp testobject myminio/functionbucket/
```

## Invoke Lambda transformation via PresignedGET

      if (method.isAnnotationPresent(TestSubtype.class)) {
        method.setAccessible(true);
        SubtypeTester tester = (SubtypeTester) clone();
        tester.method = method;
        method.invoke(tester, new Object[] {null});
      }
    }
  }

  private Type getOnlyParameterType() {
    assertThat(method.getGenericParameterTypes()).hasLength(1);
    return method.getGenericParameterTypes()[0];
  }

     * @param target
     *            the target object. Must not be {@literal null}
     * @param args
     *            the method arguments
     * @return the result of the method
     */
    <T> T invoke(Object target, Object... args);

    /**
     * Invokes a static method and returns its result.
     *
     * @param <T>
     *            the return type of the method
     * @param args

   */
  abstract void afterRanInterruptiblyFailure(Throwable error);

  /**
   * Interrupts the running task. Because this internally calls {@link Thread#interrupt()} which can
   * in turn invoke arbitrary code it is not safe to call while holding a lock.
   */
  @SuppressWarnings("Interruption") // We are implementing a user-requested interrupt.
  final void interruptTask() {

   */
  // All subclasses are owned by us and we'll make sure to get the R type right, including nullness.
  @SuppressWarnings({"unchecked", "nullness"})
  @CanIgnoreReturnValue
  public final @Nullable R invoke(@Nullable T receiver, @Nullable Object... args)
      throws InvocationTargetException, IllegalAccessException {
    return (R) invokeInternal(receiver, checkNotNull(args));
  }

    }
    assertEquals(methodName, response.methodName);
    return response;
  }

  private Object invokeMethod(String methodName, Object... arguments) throws Exception {
    return getMethod(methodName, arguments).invoke(lockLikeObject, arguments);
  }

  private Method getMethod(String methodName, Object... arguments) throws Exception {
    METHODS:
    for (Method method : lockLikeObject.getClass().getMethods()) {

        }
        if (EXT_GSS_CONTEXT_CLASS.isAssignableFrom(this.gssContext.getClass())) {
            try {
                Key k = (Key) INQUIRE_SEC_CONTEXT.invoke(this.gssContext, INQUIRE_TYPE_SESSION_KEY);
                return k.getEncoded();
            } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) {

      /**
       * Atomically reschedules this task and assigns the new future to {@link
       * #cancellationDelegate}.
       */
      @CanIgnoreReturnValue
      Cancellable reschedule() {
        // invoke the callback outside the lock, prevents some shenanigans.
        Schedule schedule;
        try {
          schedule = CustomScheduler.this.getNextSchedule();
        } catch (Throwable t) {

    }
    assertEquals(methodName, response.methodName);
    return response;
  }

  private Object invokeMethod(String methodName, Object... arguments) throws Exception {
    return getMethod(methodName, arguments).invoke(lockLikeObject, arguments);
  }

  private Method getMethod(String methodName, Object... arguments) throws Exception {
    METHODS:
    for (Method method : lockLikeObject.getClass().getMethods()) {