Drupal 8 Entity aggregate Query group by

Drupal 8 Entity aggregate Query group by

    $query = \Drupal::entityQueryAggregate('group_content')
      ->condition('type', 'section-group_node-session', '=')
      ->condition('entity_id.entity.field_session_from_time1', $startdaydate, '>=')
      ->condition('entity_id.entity.field_session_to_time1',$endaydate, '<=')
      ->groupBy('gid');
      // result we will get group by field values not group_content entity ids
    $result = $query->execute();
    
    dpm($result);