/* PSPP - a program for statistical analysis.
- Copyright (C) 1997-9, 2000, 2006, 2007 Free Software Foundation, Inc.
+ Copyright (C) 1997-9, 2000, 2006, 2007, 2009 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
const struct casereader *dataset_source (const struct dataset *ds);
-struct ccase *lagged_case (const struct dataset *ds, int n_before);
+const struct ccase *lagged_case (const struct dataset *ds, int n_before);
void dataset_need_lag (struct dataset *ds, int n_before);
+void dataset_set_callback (struct dataset *ds, void (*cb) (void *), void *);
+
#endif /* procedure.h */