code: public NfsRmdirResponse rmdir() throws IOException {
          NfsRmdirResponse response = getNfs().wrapped_sendRmdir(makeRmdirRequest());
          setFileHandle(null);
          return response;
      }
docs: /*
  (non-Javadoc)
  
  @see com.emc.ecs.nfsclient.nfs.NfsFile#rmdir()