// draw the radius grid lines, if any...
if (isRadiusGridlinesVisible()) {
Stroke gridStroke = getRadiusGridlineStroke();
Paint gridPaint = getRadiusGridlinePaint();
if ((gridStroke != null) && (gridPaint != null)) {
renderer.drawRadialGridLines(g2, this, getAxis(),
radialTicks, dataArea);
}
}
}