Bookmark\Collection
Magento\Ui\Model\ResourceModel\Bookmark\Collection
What it does
This collection class manages database queries and retrieval of UI bookmark records in Magento 2.
Developers use this collection to fetch, filter, and manipulate multiple bookmark entries that store user preferences for admin grid configurations, column positions, filters, and other UI customizations.
It provides standard collection methods for loading, filtering, and iterating through bookmark data.