getDocumentRetrievalStrategy
public java.lang.String getDocumentRetrievalStrategy()
Gets the documentRetrievalStrategy.
 Indentifies the document retrieval strategy used for this query. `relevancy_training` indicates that the results
 were returned using a relevancy trained model. `continuous_relevancy_training` indicates that the results were
 returned using the continuous relevancy training model created by result feedback analysis. `untrained` means the
 results were returned using the standard untrained model.
 **Note**: In the event of trained collections being queried, but the trained model is not used to return results,
 the **document_retrieval_strategy** will be listed as `untrained`.
- Returns:
- the documentRetrievalStrategy