docs: static protected List<MatchingDefinition> normalizeMatchingDefinitions(Map<String, ? extends Object> headingDefinitions){
  		// exactMatchExample自动设置为与regularExpression相同
  		List<MatchingDefinition> l = new ArrayList<MatchingDefinition>(headingDefinitions.size());
  		for (Map.Entry<String, ? extends Object> e: headingDefinitions.entrySet()){
  			MatchingDefinition c = new MatchingDefinition();
  			c.setRegularExpression(escapeForRegExp(e.getKey()));
  			c.setAttachment(e.getValue());
  			c.setExactMatchExample(e.getKey());
  			l.add(c);
  		}
  		return l;
  	}