diff --git a/lucene/core/src/java/org/apache/lucene/search/FilteredDocIdSet.java b/lucene/core/src/java/org/apache/lucene/search/FilteredDocIdSet.java
index b0a01424901..1d88ba8d82c 100644
--- a/lucene/core/src/java/org/apache/lucene/search/FilteredDocIdSet.java
+++ b/lucene/core/src/java/org/apache/lucene/search/FilteredDocIdSet.java
@@ -52,7 +52,12 @@ public abstract class FilteredDocIdSet extends DocIdSet {
   public FilteredDocIdSet(DocIdSet innerSet) {
     _innerSet = innerSet;
   }
-  
+
+  /** Return the wrapped {@link DocIdSet}. */
+  public DocIdSet getDelegate() {
+    return _innerSet;
+  }
+
   /** This DocIdSet implementation is cacheable if the inner set is cacheable. */
   @Override
   public boolean isCacheable() {
diff --git a/lucene/core/src/java/org/apache/lucene/search/FilteredDocIdSetIterator.java b/lucene/core/src/java/org/apache/lucene/search/FilteredDocIdSetIterator.java
index 8e5d46b105a..92a8735f7e7 100644
--- a/lucene/core/src/java/org/apache/lucene/search/FilteredDocIdSetIterator.java
+++ b/lucene/core/src/java/org/apache/lucene/search/FilteredDocIdSetIterator.java
@@ -41,6 +41,11 @@ public abstract class FilteredDocIdSetIterator extends DocIdSetIterator {
     doc = -1;
   }
 
+  /** Return the wrapped {@link DocIdSetIterator}. */
+  public DocIdSetIterator getDelegate() {
+    return _innerIter;
+  }
+
   /**
    * Validation method to determine whether a docid should be in the result set.
    * @param doc docid to be tested