* c then either a or b is not
* mergeable with c either. */
assert(job_type_is_mergeable(d, c) || !job_type_is_mergeable(a, c) || !job_type_is_mergeable(b, c));
* c then either a or b is not
* mergeable with c either. */
assert(job_type_is_mergeable(d, c) || !job_type_is_mergeable(a, c) || !job_type_is_mergeable(b, c));