A circle with a label.

Supported `attrs` properties

Selector | Node | Description
--- | --- | ---
root | SVGGElement | Container of all nodes
body | SVGCircleElement | Circular body of the shape
label | SVGTextElement | Text inside the body

    var circle = new joint.shapes.standard.Circle();
    circle.resize(100, 100);
    circle.position(250, 10);
    circle.attr('root/title', 'joint.shapes.standard.Circle');
    circle.attr('label/text', 'Circle');
    circle.attr('body/fill', 'lightblue');
    circle.addTo(graph);