public void removeMatrixIcon(final MatrixIcon MATRIX_ICON) {
        if (matrixIcons.contains(MATRIX_ICON)) {
            matrixIcons.remove(MATRIX_ICON);
        }
        fireTileEvent(REDRAW_EVENT);
    }
The distance between 2 major tick marks (used in SliderTileSkin)
@return the distance between 2 major tick marks
src/main/java/eu/hansolo/tilesfx/Tile.java