| Interface | Description | 
|---|---|
| ClusterLifecycleManager | 
 A client for communicating with the Retrieve and Rank API. 
 | 
| SolrConfigManager | 
 Manages Solr Clusters configuration. 
 | 
| Class | Description | 
|---|---|
| RetrieveAndRank | 
 The IBM Watson Retrieve and Rank service helps users find the most relevant information for their query by using a
 combination of search and machine learning to find “signals” in the data. 
 | 
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