public function formInputConfig()
    {
        $formConfig = parent::formInputConfig();

        if (!array_key_exists('options', $formConfig)) {
            $options = $this->config('options');
            $finder = $this->config('finder');
            if (!empty($options) && is_array($options)) {
                $formConfig['options'] = $options;
            } elseif ($this->_allowedEmptyOptions()) {
            } elseif (!empty($finder)) {
                $formConfig['options'] = $finder;
            }
        }

        return $formConfig;
    }