circleToMobject method
Implementation
VMobject circleToMobject(Element circleElement, SVGElementStyle style) {
var x = attributeToDouble(circleElement.attributes['cx']);
var y = attributeToDouble(circleElement.attributes['cy']);
var r = attributeToDouble(circleElement.attributes['r']);
var mob = Circle(radius: r)..shift(RIGHT * x + DOWN * y);
return applyStyle(style.update(getElementStyle(circleElement)), mob);
}