ModuleKey creates a user-space module key.

SystemKey creates an internal system key.

ErrConflict is returned when a lease is already held.

NoopLease is a no-op implementation of [Lease].

FakeLeaser is a fake implementation of the [Leaser] interface.

Lease represents a lease that is held by a controller.

Leaser is an interface for acquiring, renewing and releasing leases.

Key is a unique identifier for a lease.