public DoubleProperty angleRangeProperty() {
        if (null == angleRange) {
            angleRange = new DoublePropertyBase(_angleRange) {
                @Override protected void invalidated() {
                    final double ANGLE_RANGE = get();
                    if (ANGLE_RANGE < 0 || ANGLE_RANGE > 360) set(clamp(0.0, 360.0, ANGLE_RANGE));
                    setAngleStep(get() / getRange());
                    if (isAutoScale()) { calcAutoScale(); }
                    fireTileEvent(RECALC_EVENT);
                }
                @Override public Object getBean() { return this; }
                @Override public String getName() { return "angleRange"; }
            };
        }
        return angleRange;
    }
Defines the angle range in degree that will be used to draw the scale
of the radial tile. The given range will be clamped in the range of
0 - 360 degrees. The range will start at the startAngle and will be
drawn in the direction dependent on the scaleDirection.

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