add default implementation of convenience method

1 files changed, 4 insertions, 2 deletions

diff --git a/container-search/src/main/java/com/yahoo/data/JsonProducer.java b/container-search/src/main/java/com/yahoo/data/JsonProducer.java
index dbc652d2d7d..6d925b41379 100644
--- a/container-search/src/main/java/com/yahoo/data/JsonProducer.java
+++ b/container-search/src/main/java/com/yahoo/data/JsonProducer.java
@@ -19,9 +19,11 @@ public interface JsonProducer {
 
     /**
      * Convenience method equivalent to:
-     * makeJson(new StringBuilder()).toString()
+     * writeJson(new StringBuilder()).toString()
      * @return String containing JSON representation of this object's data.
      */
-    String toJson();
+    default String toJson() {
+        return writeJson(new StringBuilder()).toString();
+    }
 
 }