code: func (l *LanguageOpts) Init() {
  	if !l.initialized {
  		l.initialized = true
  		l.reservedWordsSet = make(map[string]struct{})
  		for _, rw := range l.ReservedWords {
  			l.reservedWordsSet[rw] = struct{}{}
  		}
  	}
  }
docs: // Init the language option