int case_source_is_complex (const struct case_source *);
int case_source_is_class (const struct case_source *,
const struct case_source_class *);
struct casefile *storage_source_get_casefile (struct case_source *);
int case_source_is_complex (const struct case_source *);
int case_source_is_class (const struct case_source *,
const struct case_source_class *);
struct casefile *storage_source_get_casefile (struct case_source *);