Model
Reader
Magento\Catalog\Model\ProductTypes\Config\Reader
What it does
This class reads and parses the product_types.xml configuration files from various Magento 2 modules.
Developers use this when they need to define or extend product types (like simple, configurable, bundle) and their associated models such as price models, indexers, and stock indexers.
It handles merging configuration from multiple modules based on specific XML node attributes.