bool job_type_is_mergeable(JobType a, JobType b);
bool job_type_is_superset(JobType a, JobType b);
bool job_type_is_conflicting(JobType a, JobType b);
bool job_type_is_mergeable(JobType a, JobType b);
bool job_type_is_superset(JobType a, JobType b);
bool job_type_is_conflicting(JobType a, JobType b);