protected function getEntryWidget($option_value)
    {
        if (!$this->hasEntryWidget($option_value)) {
            $container = new SwatFormField(
                $this->id . '_field_' . $option_value
            );
            $container->add($this->createEntryWidget($option_value));
            $container->parent = $this;
            $container->init();
            $this->entry_widgets[$option_value] = $container;
        }

        return $this->entry_widgets[$option_value];
    }