Function onEvent

packages/effect/test/ExecutionPlan.test.ts:205–208

(event: ExecutionPlan.Event<unknown>)

    const makeCollector = () => {
      const events = Array.empty<ExecutionPlan.Event<unknown>>()
      const onEvent = (event: ExecutionPlan.Event<unknown>) =>
        Effect.sync(() => {
          events.push(event)
        })
      return { events, onEvent }
    }