Expanded class hierarchy of HeartbeatSelectExtender in Heartbeat 8
- class \Drupal\Core\Database\Query\SelectExtender implements SelectInterface
- class \Drupal\Core\Database\Query\PagerSelectExtender
- class \Drupal\Core\Database\Query\TableSortExtender
- class \Drupal\search\SearchQuery
- class \HeartbeatSelectExtender