+extern int track_object_refs;
+extern int obj_allocs;
+extern struct object **objs;
+
+/** Internal only **/
+struct object *lookup_object(const unsigned char *sha1);
+
+/** Returns the object, having looked it up as being the given type. **/
+struct object *lookup_object_type(const unsigned char *sha1, const char *type);
+
+void created_object(const unsigned char *sha1, struct object *obj);