type Stamp

bendvy-ecs-core@0.1.0.3 · lifecycle.bend:4

import Base
import bendvy-ecs-core@0.1.0.3/change_tick.bend as Tick

4# Metadata is Data; payload ownership stays in the typed column. Identity is
5# the caller's closed typed column lens, never the family's display name.
6type Stamp is Data:
7  Stamp{added: Maybe<&2,Tick.Tick>,changed: Maybe<&2,Tick.Tick>}