public boolean isIrrelevant(String word) {
        if (word == null) {
            return true;
        }
        word = word.trim();
        int size = word.length();
        if (size < MIN_LENGTH || size > MAX_LENGTH) {
            return true;
        }
      return stopwords.contains(word);
    }
Checks if word is irrelevant. A word is considered irrelevant if:
(1) it is included in the stop words list or
(2) it has length smaller than {@value MIN_LENGTH} or
(3) it has length greater than {@value MAX_LENGTH}.

@param word the word to be checked
@return true if the word is irrelevant, false otherwise.
ache/src/main/java/achecrawler/util/string/Stopwords.java