Expanded class hierarchy of SolrDocument in Search API Solr 4.x
- class \Drupal\search_api_solr\Plugin\search_api\datasource\SolrDocument extends \Drupal\search_api\Datasource\DatasourcePluginBase implements PluginFormInterface uses \Drupal\search_api\Plugin\PluginFormTrait, \Drupal\search_api\LoggerTrait
- class \Drupal\search_api_solr\Plugin\search_api\datasource\SolrMultisiteDocument