code: public static void isNonPositive( int argument,
                                        String name ) {
          if (argument > 0) {
              throw new IllegalArgumentException(CommonI18n.argumentMayNotBePositive.text(name, argument));
          }
      }
docs: Check that the argument is non-positive (<=0).
  
  @param argument The argument
  @param name The name of the argument
  @throws IllegalArgumentException If argument is positive (>0)