docs: public static Thread[] getThreads(ThreadGroup group) {
  		final Thread[] slackList = new Thread[group.activeCount() * 2];
  		final int actualSize = group.enumerate(slackList);
  		final Thread[] result = new Thread[actualSize];
  		System.arraycopy(slackList, 0, result, 0, actualSize);
  		return result;
  	}