msokolov commented on code in PR #15187:
URL: https://github.com/apache/lucene/pull/15187#discussion_r2387766047
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lucene/core/src/java/org/apache/lucene/codecs/KnnVectorsReader.java:
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@@ -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:
why not simply return `this` so callers don't have to have the slightly
awkward `orElse(this)`?
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