docs: public ThreadFactoryBuilder setPriority(int priority) {
  		if (priority < Thread.MIN_PRIORITY) {
  			throw new IllegalArgumentException(StrUtil.format("Thread priority ({}) must be >= {}", priority, Thread.MIN_PRIORITY));
  		}
  		if (priority > Thread.MAX_PRIORITY) {
  			throw new IllegalArgumentException(StrUtil.format("Thread priority ({}) must be <= {}", priority, Thread.MAX_PRIORITY));
  		}
  		this.priority = priority;
  		return this;
  	}