Parameters
See RuleOptions
Returns
RuleEntry<"assignment-priority", object & RuleOptions>
Soft constraint. The solver adds a penalty for each assignment of the
targeted members, making them less likely to appear on the schedule.
The member is still assigned when coverage requires it; the penalty
only matters when the solver has a choice.
Opposite of preferAssignment. Both map to the same underlying
assignment-priority rule with different directions.