code: public static DoubleBinding hypot(final ObservableDoubleValue x, final ObservableDoubleValue y) {
          return createDoubleBinding(() -> Math.hypot(x.get(), y.get()), x, y);
      }
docs: Binding for {@link java.lang.Math#hypot(double, double)}
  
  @param x a value
  @param y a value
  @return sqrt(<i>x</i><sup>2</sup>&nbsp;+<i>y</i><sup>2</sup>)
  without intermediate overflow or underflow