How to create ember handlebar helper?

Hy to all

I try to create helper

Handlebars.registerHelper('testCan', function(permissionName, options){
  var permission = Ember.Object.extend({
    testCan: function(){
      debugger;
      return true;
    }.property()
  });

  // wipe out contexts so boundIf uses `this` (the permission) as the context
  options.contexts = null;

  Ember.Handlebars.helpers.boundIf.call(permission, "testCan", options)
});

And use it as

{{#testCan read controller=controller}}
    <h1>It's works</h1>
{{/testCan}}

I do this to test pattern from here http://ift.tt/1Fk8XdU

But it doesn't work ((

What's wrong? Ember version - 1.9.1