These objects are returned by calls to
DittoCollections. They must be kept alive for the
fetching of the attachment to proceed and for you to be notified once the status of the fetch request has changed.
Stops fetching the fetcher’s associated attachment and cleans up any associated resources.
Note that you are not required to call
stoponce your attachment fetch operation has finished. The method primarily exists to allow you to cancel an attachment fetch request while it is ongoing if you no longer wish for the attachment to be made available locally to the device.
Niling out any reference(s) you have to the attachment fetcher will also lead to the attachment fetch operation being stopped.