RegisteredCaps final class

The capability names a plugin's post type or taxonomy registered, read from the runtime's registry once plugins are loaded (probe rest-plugin-caps): a type's cap object (create_posts, edit_posts, publish_posts...) and whether it maps meta capabilities, a taxonomy's term capabilities. A built-in type's too (patterns, menu items, templates), all but posts and pages, whose families the engine knows; null for those and when no runtime is up.