Cheaper way to get number of children.

1 files changed, 6 insertions, 1 deletions

diff --git a/searchlib/src/main/java/com/yahoo/searchlib/aggregation/Group.java b/searchlib/src/main/java/com/yahoo/searchlib/aggregation/Group.java
index 0b4a1eb8bbc..4ff3b342a20 100644
--- a/searchlib/src/main/java/com/yahoo/searchlib/aggregation/Group.java
+++ b/searchlib/src/main/java/com/yahoo/searchlib/aggregation/Group.java
@@ -229,11 +229,16 @@ public class Group extends Identifiable {
         return this;
     }
 
-    /** Returns the list of child groups to this. */
+    /** Returns immutable list of child groups to this. */
     public List<Group> getChildren() {
         return List.copyOf(children);
     }
 
+    /** Returns number of children groups */
+    public int getNumChildren() {
+        return children.size();
+    }
+
     /**
      * Returns the tag of this group. This value is set per-level in the grouping request, and then becomes assigned
      * to each group of that level in the grouping result as they are copied from the prototype.