docs: @Override
      public FileEntry next () {
          FileEntry n = this.next;
          try {
              FileEntry ne = advance();
              if ( ne == null ) {
                  doClose();
                  return n;
              }
              this.next = ne;
          }
          catch ( CIFSException e ) {
              log.warn("Enumeration failed", e);
              this.next = null;
          }
          return n;
      }