code: function(shape){
          if(!shape.parent || !shape.parent.parent){
              throw new Error("It is not possible to be added alone to shape world");
          }
          shape.proxy = this.broadPhase.createProxy(shape);
          shape.updateProxy();
          this.broadPhase.addProxy(shape.proxy);
      }
docs: I'll add a shape to the world..
  Add to the rigid world, and if you add a shape to a rigid body that has been added to the world,
  Shape will be added to the world automatically, please do not call from outside this method.
  @param  shape  Shape you want to add