code: func New(fn ListPageFunc) *ListPager {
  	return &ListPager{
  		PageSize:          defaultPageSize,
  		PageFn:            fn,
  		FullListIfExpired: true,
  		PageBufferSize:    defaultPageBufferSize,
  	}
  }
docs: // New creates a new pager from the provided pager function using the default
  // options. It will fall back to a full list if an expiration error is encountered
  // as a last resort.