code: func (r Ticket) GetAttachedFile(attachmentId *int) (resp []byte, err error) {
  	params := []interface{}{
  		attachmentId,
  	}
  	err = r.Session.DoRequest("SoftLayer_Ticket", "getAttachedFile", params, &r.Options, &resp)
  	return
  }
docs: // Retrieve the file attached to a SoftLayer ticket by it's given identifier. To retrieve a list of files attached to a ticket either call the SoftLayer_Ticket::getAttachedFiles method or call SoftLayer_Ticket::getObject with ''attachedFiles'' defined in an object mask.