@@ -171,6 +171,12 @@
 					 first: first])
 			first = false;
 
 	objc_autoreleasePoolPop(pool);
 }
+
+- (OFString *)description
+{
+	return [OFString stringWithFormat: @"<%@: %@>",
+					   self.class, _categories];
+}
 @end