code: function PropObserver_notifyChanges (chglist) {
      var c;
      for (var i = 0, sz = chglist.length; sz > i; i++) {
          c = chglist[i];
          if (!c)
              continue;
          // check if we listen to this property
          if (this.props[c.name]) {
              PropObserver_notifyChange(this, c, c.name);
          }
      }
      if (this.props[ALL]) {
          PropObserver_notifyChange(this, c, ALL);
      }
  }
docs: Notify the change to the registered observers i.e. call their onPropChange method with the change description as
  parameter
  @private