docs: public static boolean startsWith(CharSequence seq, CharSequence pattern, IntUnaryOperator op)
      {
          if (pattern.length() > seq.length())
          {
              return false;
          }
          int length = pattern.length();
          for (int ii=0;ii<length;ii++)
          {
              if (op.applyAsInt(seq.charAt(ii)) != op.applyAsInt(pattern.charAt(ii)))
              {
                  return false;
              }
          }
          return true;
      }