site/examples/todo/js/lib/canjs/can.jquery.js
function () {
                        for (var name in observing) {
                            var ob = observing[name];
                            ob.observe.obj.unbind(ob.observe.attr, onchanged);
                            delete observing[name];
                        }
                    }
function () {
                        for (var name in observing) {
                            var ob = observing[name];
                            ob.observe.obj.unbind(ob.observe.attr, onchanged);
                            delete observing[name];
                        }
                    }
function ( ) { for ( var name in observing ) { var ob = observing [ name ] ; ob . observe . obj . unbind ( ob . observe . attr , onchanged ) ; delete observing [ name ] ; } }
a teardown method that stops listening
a teardown method that stops listening