code: private static int[] getFingerprints(Method[] methods) {
      if (methods == null) {
        return null;
      }
      int[] hashCodes = new int[methods.length];
      for (int i = 0; i<methods.length; i++) {
        hashCodes[i] = getFingerprint(methods[i]);
      }
      return hashCodes;
    }
docs: Convert an array of Method into an array of hash codes
  
  @param methods
  @return array of hash codes