How to use hudson.util

public OSProcess getParent() {
  IOSProcess p = proxy.getParent();
  if (p==null)    return null;
  return get(p.getPid());
}

  @Override
  public double getCategoryStart(int category, int categoryCount, Rectangle2D area, RectangleEdge edge) {
    return super.getCategoryStart(category, categoryCount, area, edge)
      - calculateCategorySize(categoryCount, area, edge) / 2;
  }
}

public boolean remove(Object o) {
  boolean b = data.remove((T)o);
  if (b)  _onModified();
  return b;
}

public ArgumentListBuilder addMasked(Secret s) {
  return add(Secret.toString(s),true);
}

public void replaceBy(Collection<? extends T> col) throws IOException {
  data.replaceBy(col);
  onModified();
}

void killByKiller() throws InterruptedException {
  for (ProcessKiller killer : getKillers())
    try {
      if (killer.kill(this)) {
        break;
      }
    } catch (IOException | Error e) {
      LOGGER.log(Level.WARNING, "Failed to kill pid=" + getPid(), e);
    }
}

private synchronized void addInternal(T node, int replica) {
  if (replica==0) {
    items.remove(node);
  } else {
    Point[] points = new Point[replica];
    String seed = hash.hash(node);
    for (int i=0; i<replica; i++)
      points[i] = new Point(md5(seed+':'+i),node);
    items.put(node,points);
  }
}

public RobustReflectionConverter(Mapper mapper, ReflectionProvider reflectionProvider) {
  this(mapper, reflectionProvider, new XStream2().new PluginClassOwnership());
}
RobustReflectionConverter(Mapper mapper, ReflectionProvider reflectionProvider, XStream2.ClassOwnership classOwnership) {

@Override
public void scan(File dir, FileVisitor visitor) throws IOException {
  super.scan(dir,visitor.with(filter));
}

@Override
protected Converter createDefaultConverter() {
  // replace default reflection converter
  reflectionConverter = new RobustReflectionConverter(getMapper(),new JVM().bestReflectionProvider(), new PluginClassOwnership());
  return reflectionConverter;
}

public ConverterImpl(Mapper mapper) {
  super(mapper);
  copyOnWriteListConverter = new CopyOnWriteList.ConverterImpl(mapper());
}

@Override
public void addObjectCreate(String pattern, Class clazz) {
  addRule(pattern,new ObjectCreateRule2(clazz));
}

public ConverterImpl(Mapper mapper) {
  super(mapper);
  copyOnWriteListConverter = new CopyOnWriteList.ConverterImpl(mapper());
}

/**
 * Takes a string, hash it with MD5, then calls {@link #lookup(int)}. 
 */
public T lookup(String queryPoint) {
  return lookup(md5(queryPoint));
}

public SecretRewriter() throws GeneralSecurityException {
  cipher = Secret.getCipher("AES");
  key = HistoricalSecrets.getLegacyKey();
}

@Override
public OSProcess get(Process proc) {
  return get(UnixReflection.pid(proc));
}

XStream2(ClassOwnership classOwnership) {
  super(getDefaultDriver());
  init();
  this.classOwnership = classOwnership;
}

  @Override
  public boolean understandsSymlink() {
    return v.understandsSymlink();
  }
};

  @Override
  public long skip(long n) throws IOException {
    long r=0;
    while (n>0) {
      int ch = read();
      if (ch<0)   break;
      n--; r++;
    }
    return r;
  }
}

@Override
public double getCategoryEnd(int category, int categoryCount, Rectangle2D area, RectangleEdge edge) {
  return super.getCategoryStart(category, categoryCount, area, edge)
    + calculateCategorySize(categoryCount, area, edge) / 2;
}