_admin_notice_post_locked() – Outputs the HTML for the notice to say that someone else is editing or has taken over editing of this post.
_custom_logo_header_styles() – Adds CSS to hide header text for custom logo, based on Customizer setting.
_get_custom_object_labels() – Build an object with custom-something object (post type, taxonomy) labels out of a custom-something object
adjacent_posts_rel_link_wp_head() – Displays relational links for the posts adjacent to the current post for single post pages.
adjacent_posts_rel_link() – Displays the relational links for the posts adjacent to the current post.
block_core_latest_posts_get_excerpt_length() – Callback for the excerpt_length filter used by the Latest Posts block at render time.
block_core_latest_posts_migrate_categories() – Handles outdated versions of the `core/latest-posts` block by converting attribute `categories` from a numeric string to an array with key `id`.