private function getCurrentValue()
    {
        $currentValue = $this->getFilter()->getCurrentValue();

        if (!is_array($currentValue)) {
            $currentValue = [];
        }

        if (!isset($currentValue['from']) || $currentValue['from'] === '') {
            $currentValue['from'] = $this->getMinValue();
        }

        if (!isset($currentValue['to']) || $currentValue['to'] === '') {
            $currentValue['to'] = $this->getMaxValue();
        }

        return $currentValue;
    }