public static DoubleBinding ceil(final ObservableDoubleValue a) {
        return createDoubleBinding(() -> Math.ceil(a.get()), a);
    }
public static DoubleBinding ceil ( final ObservableDoubleValue a ) { return createDoubleBinding ( ( ) -> Math . ceil ( a . get ( ) ) , a ) ; }
Binding for {@link java.lang.Math#ceil(double)}

@param   a   a value.
@return  the smallest (closest to negative infinity)
floating-point value that is greater than or equal to
the argument and is equal to a mathematical integer.