Model/Config/Configuration/Attributes.php
public function toOptionArray()
    {
        $fields = $this->dataHelper->getOrderTableDescription();

        $customFields[] = [
            'label' => __('---- Default Option ----'),
            'value' => '0',
        ];
        foreach ($fields as $field) {
            $customFields[] = [
                'value' => $field['COLUMN_NAME'],
                'label' => $field['COLUMN_NAME'],
            ];
        }

        return $customFields;
    }
public function toOptionArray()
    {
        $fields = $this->dataHelper->getOrderTableDescription();

        $customFields[] = [
            'label' => __('---- Default Option ----'),
            'value' => '0',
        ];
        foreach ($fields as $field) {
            $customFields[] = [
                'value' => $field['COLUMN_NAME'],
                'label' => $field['COLUMN_NAME'],
            ];
        }

        return $customFields;
    }
public function toOptionArray ( ) { $ fields = $ this -> dataHelper -> getOrderTableDescription ( ) ; $ customFields [ ] = [ 'label' => __ ( '---- Default Option ----' ) , 'value' => '0' , ] ; foreach ( $ fields as $ field ) { $ customFields [ ] = [ 'value' => $ field [ 'COLUMN_NAME' ] , 'label' => $ field [ 'COLUMN_NAME' ] , ] ; } return $ customFields ; }
Returns custom order attributes.

@return array
Returns custom order attributes .