Expanded class hierarchy of CommandHelper in Search API Solr 4.x
- class \Drupal\search_api_solr\Utility\SolrCommandHelper extends \Drupal\search_api\Utility\CommandHelper
- class \Drupal\search_api_solr\Utility\CommandHelper
- class \Drupal\search_api_solr_admin\Utility\SolrAdminCommandHelper