File: /var/www/shoetique/wp-content/plugins/wp-all-export-pro/src/App/Field/SalePriceEffectiveDate.php
<?php
namespace Wpae\App\Field;
class SalePriceEffectiveDate extends Field
{
    const SECTION = 'availabilityPrice';
    const IN_STOCK = 'in_stock';
    const OUT_OF_STOCK = 'out_of_stock';
    public function getValue($snippetData)
    {
        $availabilityPrice = $this->feed->getSectionFeedData(self::SECTION);
        if(isset($availabilityPrice['salePriceEffectiveDate'])) {
            return $availabilityPrice['salePriceEffectiveDate'];
        } else {
            return '';
        }
    }
    public function getFieldName()
    {
        return 'sale_price_effective_date';
    }
}