ProductPriceOptionsInterface
Magento\Catalog\Model\Config\Source\ProductPriceOptionsInterface
What it does
This interface defines the structure for product price option sources in Magento 2, specifically for handling fixed or percentage-based pricing.
Developers implement this interface when creating custom price option sources for product configuration, such as in custom options, bundled products, or price adjustments.
It extends OptionSourceInterface to provide standardized price type options ('fixed' or 'percent') across the catalog module.