Function pull

apps/sim/connectors/utils.test.ts:1150–1156

(controller)

  let index = 0
  const stream = new ReadableStream<Uint8Array>({
    pull(controller) {
      if (index < chunks.length) {
        controller.enqueue(chunks[index++])
      } else {
        controller.close()
      }
    },
    cancel() {
      onCancel?.()
    },