Uploading Attachments in Couchbase

we are using CouchDB for our needs until now, we trying to migrate to couch base.
In CouchDB, we have an option to upload multiple attachments into the document. I tried in the Couchbase console UI, there is nowhere we can upload attachments.
Is there any setting I missed or Couchbase server will not support uploading attachments??
is support uploading attachments through couchbase server java SDK?? if yes, can you guys provide me a link on how I can upload attachments using Java SDK to Couchbase server bucket level?