Returns the attachment that has the specified ID. Attachment IDs are generated by the case management system when you add an attachment to a case or case communication. Attachment IDs are returned in the AttachmentDetails objects that are returned by the DescribeCommunications operation.
support_describe_attachment(attachmentId)
[required] The ID of the attachment to return. Attachment IDs are returned by the DescribeCommunications operation.
svc$describe_attachment( attachmentId = "string" )