public void setSmoothing(final boolean SMOOTHING) {
        if (null == smoothing) {
            _smoothing = SMOOTHING;
            fireTileEvent(REDRAW_EVENT);
        } else {
            if (!smoothing.isBound()) {
                smoothing.set(SMOOTHING);
            }
        }
    }
Defines if the smoothing property should be enabled/disabled.
At the moment this is only used in the SparkLineTileSkin and
RadarChartTileSkin.
@param SMOOTHING
src/main/java/eu/hansolo/tilesfx/Tile.java