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Model

Category

Magento\Catalog\Model\Layer\Category

What it does

This class represents the catalog layer for category pages in Magento 2.

Developers use this class when working with layered navigation (filtering) on category pages, as it manages the product collection, available filters, and current filter state for a specific category.

It extends the base Layer class to provide category-specific functionality for building and managing the product listing and filter options.