thecoop commented on code in PR #15187:
URL: https://github.com/apache/lucene/pull/15187#discussion_r2387887696


##########
lucene/core/src/java/org/apache/lucene/codecs/KnnVectorsReader.java:
##########
@@ -49,6 +50,14 @@ protected KnnVectorsReader() {}
    */
   public abstract void checkIntegrity() throws IOException;
 
+  /**
+   * If this reader wraps another for {@code field}, return the underlying 
reader, else return
+   * {@link Optional#empty}
+   */
+  public Optional<KnnVectorsReader> unwrapReaderForField(String field) {
+    return Optional.empty();

Review Comment:
   Updated



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