public BooleanProperty discreteHoursProperty() {
        if (null == discreteHours) { discreteHours = new SimpleBooleanProperty(Tile.this, "discreteHours", _discreteHours); }
        return discreteHours;
    }
Defines if the hour hand of the clock should move in
discrete steps of 1 hour. This behavior was more or less
implemented to realize the clock of clocks and should usually
be false.
@param DISCRETE
src/main/java/eu/hansolo/tilesfx/Tile.java