11 files declare their use of Cluster in Elasticsearch Connector 8.2

ClientManager.php in src/ElasticSearch/ClientManager.php

ClientManagerInterface.php in src/ElasticSearch/ClientManagerInterface.php

ClusterDeleteForm.php in src/Form/ClusterDeleteForm.php

Contains \Drupal\elasticsearch_connector\Form\ClusterDeleteForm.

ClusterForm.php in src/Form/ClusterForm.php

Contains Drupal\elasticsearch_connector\Form.

ClusterListBuilder.php in src/Controller/ClusterListBuilder.php

Contains \Drupal\elasticsearch_connector\Controller\ClusterListBuilder.

ElasticsearchController.php in src/Controller/ElasticsearchController.php

Contains \Drupal\elasticsearch_connector\Controller\ElasticsearchController.

ElasticsearchViewsQuery.php in modules/elasticsearch_connector_views/src/Plugin/views/query/ElasticsearchViewsQuery.php

elasticsearch_connector_views.views.inc in modules/elasticsearch_connector_views/elasticsearch_connector_views.views.inc

Views hook implementations for the Search API module.

IndexDeleteForm.php in src/Form/IndexDeleteForm.php

Contains \Drupal\elasticsearch_connector\Form\IndexDeleteForm.

IndexForm.php in src/Form/IndexForm.php

Contains \Drupal\elasticsearch_connector\Form\IndexForm.

SearchApiElasticsearchBackend.php in src/Plugin/search_api/backend/SearchApiElasticsearchBackend.php

Contains the SearchApiElasticsearchBackend object.