// Slugs.
                    add_filter( 'pre_term_slug', 'sanitize_title' );
                    add_filter( 'wp_insert_post_data', '_wp_customize_changeset_filter_insert_post_data', 10, 2 );
                    
                    // Mime types.
                    add_filter( 'pre_post_mime_type', 'sanitize_mime_type' );
                    add_filter( 'post_mime_type', 'sanitize_mime_type' );
                    
                    // Meta.
                    add_filter( 'register_meta_args', '_wp_register_meta_args_allowed_list', 10, 2 );
                    
                    // Counts.
                    add_action( 'admin_init', 'wp_schedule_update_user_counts' );
                    add_action( 'wp_update_user_counts', 'wp_schedule_update_user_counts', 10, 0 );
                    foreach ( array( 'user_register', 'deleted_user' ) as $action ) {
                        add_action( $action, 'wp_maybe_update_user_counts', 10, 0 );
                    }

                    // Comment meta.
                    add_action( 'added_comment_meta', 'wp_cache_set_comments_last_changed' );
                    add_action( 'updated_comment_meta', 'wp_cache_set_comments_last_changed' );
                    add_action( 'deleted_comment_meta', 'wp_cache_set_comments_last_changed' );
                    
                    // Post meta.
                    add_action( 'added_post_meta', 'wp_cache_set_posts_last_changed' );
                    add_action( 'updated_post_meta', 'wp_cache_set_posts_last_changed' );
                    add_action( 'deleted_post_meta', 'wp_cache_set_posts_last_changed' );

                    $script_handle = $metadata[ $field_name ];
                    if ( is_array( $script_handle ) ) {
                        if ( empty( $script_handle[ $index ] ) ) {
                            return false;
                        }
                        $script_handle = $script_handle[ $index ];
                    }
                
                    $script_path = remove_block_asset_path_prefix( $script_handle );
                    if ( $script_handle === $script_path ) {
                        return $script_handle;
                    }
                
                    $script_handle     = generate_block_asset_handle( $metadata['name'], $field_name, $index );
                    $script_asset_path = wp_normalize_path(
                        realpath(
                            dirname( $metadata['file'] ) . '/' .
                            substr_replace( $script_path, '.asset.php', - strlen( '.js' ) )
                        )
                    );
                    
                    // Term meta.
                    add_action( 'added_term_meta', 'wp_cache_set_terms_last_changed' );
                    add_action( 'updated_term_meta', 'wp_cache_set_terms_last_changed' );
                    add_action( 'deleted_term_meta', 'wp_cache_set_terms_last_changed' );
                    add_filter( 'get_term_metadata', 'wp_check_term_meta_support_prefilter' );
                    add_filter( 'add_term_metadata', 'wp_check_term_meta_support_prefilter' );
                    add_filter( 'update_term_metadata', 'wp_check_term_meta_support_prefilter' );
                    add_filter( 'delete_term_metadata', 'wp_check_term_meta_support_prefilter' );
                    add_filter( 'get_term_metadata_by_mid', 'wp_check_term_meta_support_prefilter' );
                    add_filter( 'update_term_metadata_by_mid', 'wp_check_term_meta_support_prefilter' );
                    add_filter( 'delete_term_metadata_by_mid', 'wp_check_term_meta_support_prefilter' );
                    add_filter( 'update_term_metadata_cache', 'wp_check_term_meta_support_prefilter' );

                    foreach ( $property_mappings as $key => $mapped_key ) {
                        if ( isset( $metadata[ $key ] ) ) {
                            $settings[ $mapped_key ] = $metadata[ $key ];
                            if ( $textdomain && isset( $i18n_schema->$key ) ) {
                                $settings[ $mapped_key ] = translate_settings_using_i18n_schema( $i18n_schema->$key );
                            }
                        }
                    }