Adds one or more attachments to an attachment set.
See https://www.paws-r-sdk.com/docs/support_add_attachments_to_set/ for full documentation.
support_add_attachments_to_set(attachmentSetId = NULL, attachments)The ID of the attachment set. If an attachmentSetId is not specified,
a new attachment set is created, and the ID of the set is returned in
the response. If an attachmentSetId is specified, the attachments are
added to the specified set, if it exists.
[required] One or more attachments to add to the set. You can add up to three attachments per set. The size limit is 5 MB per attachment.
In the Attachment object, use the data parameter to specify the
contents of the attachment file. In the previous request syntax, the
value for data appear as blob, which is represented as a
base64-encoded string. The value for fileName is the name of the
attachment, such as troubleshoot-screenshot.png.