code: public static IntegerBinding addExact(final ObservableIntegerValue x, final ObservableIntegerValue y) {
          return createIntegerBinding(() -> Math.addExact(x.get(), y.get()), x, y);
      }
docs: Binding for {@link java.lang.Math#addExact(int, int)}
  
  @param x the first value
  @param y the second value
  @return the result
  @throws ArithmeticException if the result overflows an int