+Music_iterator *
+Music_wrapper_iterator::try_music_in_children (Music *m) const
+{
+ return child_iter_->try_music (m);
+}
+
+IMPLEMENT_CTOR_CALLBACK (Music_wrapper_iterator);
+
+bool
+Music_wrapper_iterator::run_always () const
+{
+ return child_iter_->run_always ();
+}