Context: How does \Magento\Framework\EntityManager\Operation\Read\ReadExtensions::execute() work?
\Magento\Framework\EntityManager\Operation\Read\ReadExtensions::execute()
Details: How does \Magento\Catalog\Model\Product\Option\Repository::getProductOptions() work?
\Magento\Catalog\Model\Product\Option\Repository::getProductOptions()
See also:
product-read-handler
product-retrieving