code: public String getWikiAttachmentEndpoint(Object wikiId, Object attachmentId) throws BacklogException {
          return buildEndpoint("wikis/" + wikiId + "/attachments/" + attachmentId);
      }
docs: Returns the endpoint of Wiki page's attachment file.
  
  @param wikiId       the Wiki page identifier
  @param attachmentId the attachment identifier
  @return the endpoint
  @throws BacklogException