// draw the domain grid lines, if any...
if (isAngleGridlinesVisible()) {
Stroke gridStroke = getAngleGridlineStroke();
Paint gridPaint = getAngleGridlinePaint();
if ((gridStroke != null) && (gridPaint != null)) {
renderer.drawAngularGridLines(g2, this, angularTicks,
dataArea);
}
}
// draw the radius grid lines, if any...