code: public static void checkIfMultipleOf8AndGT0(final long v, final String argName) {
      if (((v & 0X7L) == 0L) && (v > 0L)) {
        return;
      }
      throw new SketchesArgumentException("The value of the parameter \"" + argName
        + "\" must be a positive multiple of 8 and greater than zero: " + v);
    }
docs: Checks if parameter v is a multiple of 8 and greater than zero.
  @param v The parameter to check
  @param argName This name will be part of the error message if the check fails.