struct ccase *casewindow_get_case (const struct casewindow *,
casenumber case_idx);
const struct caseproto *casewindow_get_proto (const struct casewindow *);
-casenumber casewindow_get_case_cnt (const struct casewindow *);
+casenumber casewindow_get_n_cases (const struct casewindow *);
bool casewindow_error (const struct casewindow *);
void casewindow_force_error (struct casewindow *);