pekko-connectors-sample-ftp-to-file/src/main/java/playground/filesystem/impl/JimfsView.java [115:132]:
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    public boolean changeWorkingDirectory(String dir) throws FtpException {

        // not a directory - return false
        dir = getPhysicalName(dir);
        Path dirPath = fileSystem.getPath(dir);
        if (!Files.isDirectory(dirPath)) {
            return false;
        }

        // strip user root and add last '/' if necessary
        dir = dir.substring(rootDir.length() - 1);
        if (dir.charAt(dir.length() - 1) != '/') {
            dir = dir + '/';
        }

        currDir = dir;
        return true;
    }
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pekko-connectors-sample-rotate-logs-to-ftp/src/main/java/playground/filesystem/impl/JimfsView.java [113:130]:
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  public boolean changeWorkingDirectory(String dir) throws FtpException {

    // not a directory - return false
    dir = getPhysicalName(dir);
    Path dirPath = fileSystem.getPath(dir);
    if (!Files.isDirectory(dirPath)) {
      return false;
    }

    // strip user root and add last '/' if necessary
    dir = dir.substring(rootDir.length() - 1);
    if (dir.charAt(dir.length() - 1) != '/') {
      dir = dir + '/';
    }

    currDir = dir;
    return true;
  }
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