public DoubleProperty lowerThresholdProperty() {
        if (null == lowerThreshold) {
            lowerThreshold = new DoublePropertyBase(_lowerThreshold) {
                @Override protected void invalidated() {
                    set(clamp(getMinValue(), getMaxValue(), get()));
                    fireTileEvent(RESIZE_EVENT);
                }
                @Override public Object getBean() { return Tile.this; }
                @Override public String getName() { return "lowerThreshold"; }
            };
        }
        return lowerThreshold;
    }
Sets the threshold of the tile to the given value. The value
will be clamped to the range of the tile.

@param THRESHOLD
src/main/java/eu/hansolo/tilesfx/Tile.java