src/FilterSetting/Tags.php
protected function getFrontendFilterValue($arrWidget, $arrFilterUrl, $strKeyOption)
    {
        $arrCurrent = (array) $arrWidget['value'];

        if ($this->isActiveFrontendFilterValue($arrWidget, $arrFilterUrl, $strKeyOption)) {
            $arrCurrent = array_diff($arrCurrent, array($strKeyOption));
        } else {
            $arrCurrent[] = $strKeyOption;
        }

        return implode(',', $arrCurrent);
    }
protected function getFrontendFilterValue($arrWidget, $arrFilterUrl, $strKeyOption)
    {
        $arrCurrent = (array) $arrWidget['value'];

        if ($this->isActiveFrontendFilterValue($arrWidget, $arrFilterUrl, $strKeyOption)) {
            $arrCurrent = array_diff($arrCurrent, array($strKeyOption));
        } else {
            $arrCurrent[] = $strKeyOption;
        }

        return implode(',', $arrCurrent);
    }
{@inheritdoc}