leventov commented on a change in pull request #7306: Reconcile terminology and 
method naming to 'used/unused segments'; Rename MetadataSegmentManager to 
MetadataSegments
URL: https://github.com/apache/druid/pull/7306#discussion_r369503675
 
 

 ##########
 File path: 
server/src/main/java/org/apache/druid/metadata/IndexerSQLMetadataStorageCoordinator.java
 ##########
 @@ -908,7 +1009,7 @@ private boolean segmentExists(final Handle handle, final 
DataSegment segment)
    * Read dataSource metadata. Returns null if there is no metadata.
    */
   @Override
-  public DataSourceMetadata getDataSourceMetadata(final String dataSource)
+  public @Nullable DataSourceMetadata retrieveDataSourceMetadata(final String 
dataSource)
 
 Review comment:
   I prefer putting `@Nullable` before the type because semantically it 
characterizes the returned type, not the method (there are also modifiers and 
other annotations in between).

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