in toolkit/jb/svg.js [320:329]
function initKnobInGroup(knob, target, id, count, width, height, valueIn) {
var submit;
d3.select(target).append('g')
.attr('transform', 'translate(0,' + ((id * height) + (height / 2) - (count * height / 2)) + ')')
.call(function(knobRoot) {
knob.root = knobRoot;
submit = knob.init(knobRoot.node(), valueIn);
});
return submit;
}