tracker_cron() Implements

tracker_uninstall() Implements

tracker_comment_delete(CommentInterface $comment) Implements

tracker_node_predelete(EntityInterface $node, $arg = 0) Implements

tracker_help($route_name, RouteMatchInterface $route_match) Implements

tracker_node_update(NodeInterface $node, $arg = 0) Implements

_tracker_calculate_changed($node) Picks the most recent timestamp between node changed and the last comment

_tracker_add($nid, $uid, $changed) Updates indexing tables when a node is added, updated, or commented on.