Function forEachThing

src/common/definable.ts:73–74

(cb: (id: Id, value: Thing) => void)

  const getThingIds = (): Ids => mapKeys(tableIds);

  const forEachThing = (cb: (id: Id, value: Thing) => void): void =>
    mapForEach(things, cb);

  const hasThing = (id: Id): boolean => collHas(things, id);