Listener is deregistered when returned object is destroyed.

1 files changed, 1 insertions, 0 deletions

diff --git a/persistence/src/vespa/persistence/spi/persistenceprovider.h b/persistence/src/vespa/persistence/spi/persistenceprovider.h
index 2d2864bd1fa..2fc0713abe8 100644
--- a/persistence/src/vespa/persistence/spi/persistenceprovider.h
+++ b/persistence/src/vespa/persistence/spi/persistenceprovider.h
@@ -380,6 +380,7 @@ struct PersistenceProvider
 
     /*
      * Register a listener for updates to resource usage.
+     * The listener is deregistered when the returned object is destroyed.
      */
     virtual std::unique_ptr<vespalib::IDestructorCallback> register_resource_usage_listener(IResourceUsageListener& listener) = 0;