passing data to the view always null or empty!

[Abanoub]

 
 Espo.define('custom:views/deal/list', ['view', 'multi-collection', 'lib!DataTable', 'lib!DataTableBootstrap'], function (Dep) {      return Dep.extend({         template: "custom:deal/list",           setup: function () {             //Dep.prototype.setup.call(this);               console.log(this.data);              this.fetch(function (data) {                 this.data = data;                 this.reRender();             });              console.log(this.data);          },          afterRender: function () {               // $('#example').DataTable({             //     "dom": '<"toolbar">frtip'             // });           },         data:function () {             return{              }         }         ,         fetch: function (callback) {             $.ajax({                 type: 'get',                 url: "Deal/action/DealsList",                 success: function (response) {                     callback.call(this, response);                 }.bind(this)             });         }     });  });