// `boolean canAccess(Object)`.
  public void testApiCompatibleWithAccessibleObject() {
    ImmutableSet<String> invokableMethods =
        publicMethodSignatures(Invokable.class, ImmutableSet.<String>of());
    ImmutableSet<String> accessibleObjectMethods =
        publicMethodSignatures(AccessibleObject.class, ImmutableSet.of("canAccess"));

    }

    /**
     * Set field value with cached accessibility.
     */
    private void setFieldValue(Object bean, Field field, Object value) throws IllegalAccessException {
        if (!field.canAccess(bean)) {
            field.setAccessible(true);
        }
        field.set(bean, value);
    }

    /**
     * Clear all caches. Useful for testing or memory management.
     */