title: ko.mapping, how listening change property of object?
body: <p>how can I get change event for next object?</p>
  
  <pre><code>    $(function () {
      var Data = {
          id: ko.observable(15),
          name: ko.observable('my name'),
          status: ko.observable('status')
      }
  
      var ClickCounterViewModel = function () {
          var me = this;
          me.Model = ko.observable(Data);
  
          me.change = ko.computed(function () {
              var m = me.Model();
              console.log(m.status());
          });
      };
  
      ko.applyBindings(new ClickCounterViewModel());
  });
  </code></pre>
  
  <p>I get object Data from: </p>
  
  <pre><code>ko.mapping(AnyInitData, {}, Data);
  </code></pre>
  
  <p>Model has all properties as observable, but If any value by changed I want know about this.
  It may be do through ko.computed, but I have very much properties, and don't wont doing it.</p>
  
  <p>This example output of console only 'status' if status was changed, but doing nothing if property 'name' was changed.</p>
  
  <p>Sorry, for my English.</p>