missing dateBar in tutorial page

[cwangv]

Hi, Mango Team
While I was following the sample codes in the Create energy chart component and I notice that the dateBar is missing from the final product.
I believe the following code is missing from the sample code 'hvac.js' on that page-

params: {
                       dateBar: {
                           rollupControls: true
                       }
                   }

I found this out by looking at the final 'hvac.js' code for Create alarm list component

Thank you!