Function single

packages/effect/src/internal/stream/emit.ts:43–45

(this: Emit.Emit<R, E, A, B>, value: A)

      return this(Effect.failCause(pipe(cause, Cause.map(Option.some))))
    },
    single(this: Emit.Emit<R, E, A, B>, value: A) {
      return this(Effect.succeed(Chunk.of(value)))
    }
  }
  return Object.assign(emit, ops)
}