Context: How does \Magento\Framework\EntityManager\Operation\Read\ReadExtensions::execute()
work?
![](https://mage2.pro/uploads/default/original/2X/6/68715e8c9bbbd2900a8327de5d2caccba349e417.png)
Details: How does \Magento\Catalog\Model\ResourceModel\Product\Gallery::loadProductGalleryByAttributeId()
work?
![](https://mage2.pro/uploads/default/original/2X/0/08cf9d18ef737e5d8c68d9a55f02b8fba0ebf682.png)
![](https://mage2.pro/uploads/default/original/2X/8/8b40739e29ad6e6ad87e42e2926d4e81a7949a1a.png)
![](https://mage2.pro/uploads/default/original/2X/f/fa0001345aa88dfaeddc13b4a11525f27ccde724.png)
Details: How does \Magento\ProductVideo\Model\Plugin\Catalog\Product\Gallery\ReadHandler::afterExecute()
work?