+struct casereader *
+casereader_translate_stateless (struct casereader *,
+ const struct caseproto *output_proto,
+ const struct casereader_translator_class *,
+ void *aux);
+
+struct casereader *casereader_project (struct casereader *,
+ const struct subcase *);
+struct casereader *casereader_project_1 (struct casereader *, int column);
+struct casereader *casereader_select (struct casereader *,
+ casenumber first, casenumber last,
+ casenumber by);