--- a/src/collect.h	Wed Dec 12 22:02:48 2018 +0200
+++ b/src/collect.h	Tue May 14 11:46:50 2019 +0300
@@ -86,7 +86,8 @@
 CollectWindow *collection_window_find_by_path(const gchar *path);
 gboolean collection_window_modified_exists(void);
 
-gboolean is_collection(gchar *param);
-gchar *collection_path(gchar *param);
+gboolean is_collection(const gchar *param);
+gchar *collection_path(const gchar *param);
+void collection_contents(const gchar *name, GString **contents);
 #endif
 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */