docs: public static String delPre(String regex, CharSequence content) {
  		if (null == content || null == regex) {
  			return StrUtil.str(content);
  		}
  
  		// Pattern pattern = Pattern.compile(regex, Pattern.DOTALL);
  		final Pattern pattern = PatternPool.get(regex, Pattern.DOTALL);
  		Matcher matcher = pattern.matcher(content);
  		if (matcher.find()) {
  			return StrUtil.sub(content, matcher.end(), content.length());
  		}
  		return StrUtil.str(content);
  	}