"""
        if self.cid is not None:
            fetcher = self._create_credentials_fetcher()
            return RefreshableCredentials.create_from_metadata(
                metadata=fetcher(),
                refresh_using=fetcher,
                method=self.METHOD,
            )
        else:
            return None

    def _create_credentials_fetcher(self):
        method = self.METHOD

        def fetch_credentials():

    if (object instanceof Set) {
      Set<?> that = (Set<?>) object;
      return (this.size() == that.size()) && this.containsAll(that);
    }
    return false;
  }

  @Override
  public int hashCode() {
    int hashCodeSum = 0;
    for (Object o : this) {
      hashCodeSum += (o == null) ? 0 : o.hashCode();
    }
    return hashCodeSum;
  }

            }
            return true;
        }

        final File parentFile = outputFile.getParentFile();
        if (!parentFile.exists()) {
            parentFile.mkdirs();
        }
        if (!parentFile.isDirectory()) {
            logger.warn("Not found: {}", parentFile.getAbsolutePath());
            return false;
        }

        return process(thumbnailId, responseData -> {

    /**
     * Returns the file name extension of the artifact;
     * e.g. "jar", "pom", "xml", etc.
     *
     * @return the file extension
     */
    String getExtension();

    String getDirectory();

    /**
     * Returns the default classifier used if a different one is not set in pom.xml.
     *
     * @return the classifier
     */
    String getClassifier();

        if ( c.getConfig().isTraceResourceUsage() ) {
            return new SmbTreeConnectionTrace(c);
        }
        return new SmbTreeConnection(c);
    }


    static SmbTreeConnection create ( SmbTreeConnection c ) {
        if ( c.ctx.getConfig().isTraceResourceUsage() ) {
            return new SmbTreeConnectionTrace(c);
        }
        return new SmbTreeConnection(c);
    }


    /**

     *
     * @param phase
     * @return
     */
    public Lifecycle get(String phase) {
        return getPhaseToLifecycleMap().get(phase);
    }

    /**
     * We use this to map all phases to the lifecycle that contains it. This is used so that a user can specify the
     * phase they want to execute and we can easily determine what lifecycle we need to run.
     *
     * @return A map of lifecycles, indexed on id
     */

            beg_idx = ( beg_idx + 1 ) % pipe_buf.length;
        }
        return result;
    }
    public int read( byte[] b ) throws IOException {
        return read( b, 0, b.length );
    }
    public int read( byte[] b, int off, int len ) throws IOException {
        int result = -1;
        int i;

        if( len <= 0 ) {
            return 0;
        }
        synchronized( lock ) {
            try {

        if (url == null) {
            return StringUtil.EMPTY_STRINGS;
        }
        final SearchResponse response = client.prepareSearch(index).setQuery(QueryBuilders.termQuery(fessConfig.getIndexFieldUrl(), url))
                .setFetchSource(false).setSize(fessConfig.getPageScoreBoosterMaxFetchSizeAsInteger()).execute().actionGet(requestTimeout);

    }

    public String getNewInput() {
        return newInput;
    }

    public void setNewInput(final String newInput) {
        this.newInput = newInput;
    }

    public String getInput() {
        return input;
    }

    public String getInputValue() {
        if (input == null) {
            return StringUtil.EMPTY;
        }
        return input;
    }

    public boolean isUpdated() {

      JsonAdapter<RtmStartResponse> jsonAdapter = moshi.adapter(RtmStartResponse.class);
      return jsonAdapter.fromJson(response.body().source());
    }
  }

  /** See https://api.slack.com/rtm. */
  public WebSocket rtm(HttpUrl url, WebSocketListener listener) {
    return httpClient.newWebSocket(new Request.Builder()
        .url(url)
        .build(), listener);
  }