All classes that implement QueryInterface in Zircon Profile 8

class \Drupal\Core\Config\Entity\Query\Query implements QueryInterface
class \Drupal\Core\Entity\KeyValueStore\Query\Query
class \Drupal\Core\Entity\Query\Null\Query implements QueryAggregateInterface, QueryInterface
class \Drupal\Core\Entity\Query\QueryBase implements QueryInterface
class \Drupal\Core\Entity\Query\Sql\Query implements QueryInterface
class \Drupal\Core\Entity\Query\Sql\QueryAggregate implements QueryAggregateInterface

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