Privileged: drop the record at businessPath. ApiOnly.
Privileged: set an existing record's status. ApiOnly.
The first still-active (not quit/fired) employment, or undefined.
Mixin names conferred by every on-shift Employment's Position.
The record at businessPath, or undefined.
All employment records as value objects.
True iff any employment is currently on shift (sync hot-path read).
Public method surface (methods only).
employmentsis public for the Hydrator but is not the contract surface.