code: public CronPattern getPattern(String id) {
  		final int index = ids.indexOf(id);
  		if (index > -1) {
  			return getPattern(index);
  		}
  		return null;
  	}
docs: 获得指定id的{@link CronPattern}
  
  @param id ID
  @return {@link CronPattern}
  @since 3.1.1