- @Nonnull <L extends DataTreeChangeListener> ListenerRegistration<L> registerDataTreeChangeListener(@Nonnull DataTreeIdentifier treeId, @Nonnull L listener);
-}
\ No newline at end of file
+ @Nonnull <T extends DataObject,L extends DataTreeChangeListener<T>> ListenerRegistration<L>
+ registerDataTreeChangeListener(@Nonnull DataTreeIdentifier<T> treeId, @Nonnull L listener);
+}