SOLVER_ESSENTIAL
{ SOLVER_ESSENTIAL, "essential" },
if (!essentialok && sug < 0 && (solv->job.elements[-sug - 1] & SOLVER_ESSENTIAL) != 0)
if (!essentialok && (solv->job.elements[-v - 1] & SOLVER_ESSENTIAL) != 0)
int af = job->elements[-a - 1] & SOLVER_ESSENTIAL;
int bf = job->elements[-b - 1] & SOLVER_ESSENTIAL;
if (how & SOLVER_ESSENTIAL)