public void setBorderWidth(final double WIDTH) {
        if (null == borderWidth) {
            _borderWidth = clamp(0.0, 50.0, WIDTH);
            fireTileEvent(REDRAW_EVENT);
        } else {
            if (!borderWidth.isBound()) {
                borderWidth.set(WIDTH);
            }
        }
    }
Defines the width in pixels that will be used to draw the border of the tile.
The value will be clamped between 0 and 50 pixels.

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