+/* Destroys SOURCE and returns the casefile that it
+ encapsulated. */
+struct casefile *
+storage_source_decapsulate (struct case_source *source)
+{
+ struct storage_stream_info *info = source->aux;
+ struct casefile *casefile;
+
+ assert (source->class == &storage_source_class);
+ casefile = info->casefile;
+ info->casefile = NULL;
+ destroy_storage_stream_info (info);
+ return casefile;
+}
+
+/* Creates and returns a new storage stream that encapsulates
+ CASEFILE. */