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Model

Reader

Magento\Config\Model\Config\Structure\Reader

What it does

This class reads and processes system.xml configuration files from Magento 2 modules to build the backend admin configuration structure.

Developers use this when they need to understand how Magento loads and merges system configuration settings from multiple modules into a unified configuration tree.

It handles XML validation, merging configurations from different modules, and compiling the final structure that powers the Stores > Configuration section in the admin panel.