Bolding the edge of a js box2d circle?

[Fuzzyhed]

I have a circle created in this code (No referencing here, just what you need to see.):

    var ballSd = new b2CircleDef();
    
    ballSd.density = 0.1;
    ballSd.radius = 12;
    ballSd.restitution = 0.5;
    ballSd.friction = 1;
    ballSd.userData = 'player';
    var ballBd = new b2BodyDef();
    ballBd.linearDamping = .03;
    ballBd.allowSleep = false;
    ballBd.AddShape(ballSd);
    ballBd.position.Set(20,0);
    player.object = world.CreateBody(ballBd);


}

I want to know what property can give this a bolded edge, or how to do it. And by that I mean, like the kind of edges on the box2d logo.

[Kwaq]

[URL="http://code.google.com/p/box2dweb/source/browse/trunk/Box2D.js?r=29"]Assuming I am looking at the right thing, [/URL] you can ctrl+f in here for LineThickness and it shows a lot of different parameters and things. Not really sure about what you are asking though so sorry if it didn't help!