Hello, Magento Developer!!
Proxy is another new feature in Magento 2. It is a set of classes, automatically generated by Magento on compile-time. Proxies are used to lazy load a class they extend. Deep dive into What is Proxies in Magento 2 | All You Need to Know.
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Complete Tutorial at https://magecomp.com/blog/proxies-in-magento-2-all-you-need-to-know/
