code: private static EnumSet<CorsHttpMethods> splitToEnumSet(String str, String delimiter) {
          EnumSet<CorsHttpMethods> set = EnumSet.noneOf(CorsHttpMethods.class);
          StringTokenizer st = new StringTokenizer(str, delimiter);
          while (st.hasMoreElements()) {
              set.add(CorsHttpMethods.valueOf(st.nextToken()));
          }
          return set;
      }
docs: Split a delimiter separated string into a EnumSet of CorsHttpMethods
  
  @param str
  the string to split
  @param delimiter
  the character to split on
  @return the set of CorsHttpMethods