protected function checkIfSingleInSetNotEmpty(
        $fieldName,
        $canUseFlexforms,
        $sheet,
        $explanation,
        array $allowedValues
    ) {
        $this->checkForNonEmptyString(
            $fieldName,
            $canUseFlexforms,
            $sheet,
            $explanation
        );
        $this->checkIfSingleInSetOrEmpty(
            $fieldName,
            $canUseFlexforms,
            $sheet,
            $explanation,
            $allowedValues
        );
    }