code: function me(g, id, x, y, s) {
      var e = new joint.shapes.standard.Circle({
          id: id,
          position: { x: x, y: y },
          size: { width: s || 50, height: s || 50 },
          attrs: {
              label: {
                  text: id,
                  fontWeight: 'bold'
              }
          }
      });
      e.addTo(g);
      return e;
  }
docs: make element