code: public boolean shouldGzip(String contentType) {
      if(gzipList == null || gzipList.isEmpty()) {
        return true;
      } else {
        return gzipList.contains(contentType) || gzipList.contains(contentType.replaceAll("/[^/]+\\Z", "/*")) || gzipList.contains(contentType.replaceAll("\\A[^/]+/", "*/"));
      }
    }
docs: <p>Checks for inclusion in the gzipList field. Allows basic wild cards.</p>
  <p>An empty or null field defaults to gzipping of all content types.</p>
  @param contentType
  @return