docs: public String getDfsPath() throws SmbException {
          resolveDfs(null);
          if( dfsReferral == null ) {
              return null;
          }
          String path = "smb1:/" + dfsReferral.server + "/" + dfsReferral.share + unc;
          path = path.replace( '\\', '/' );
          if (isDirectory()) {
              path += '/';
          }
          return path;
      }