Paginate nested elements

Hi,

I am trying to paginate over items which have been purchased through a certain time period. My goal is to display the items annotated by the date they have been purchased.
Here is my code snippet,

``` HTML

JSON data source:

``` JavaScript
{
"28-06-2016":[{itemId: "11", itemName: "item_11"},{itemId: "22", itemName: "item_22"}],
"22-06-2016":[{itemId: "101", itemName: "item_101"},{itemId: "202", itemName: "item_202"},{itemId: "303", itemName: "item_303"}],
"20-06-2016":[{itemId: "1001", itemName: "item_1001"}]
}
```

However, I end up seeing just the list of dates and the following error on console, "the itemsPerPage id argument does not match a registered pagination-id".
Any help with this?

Start with the provided nested dir-paginate example and the console error about the itemsPerPage id not matching a registered pagination-id. Determine how pagination is expected to work across the date groups; done means the nested item lists render with pagination and no console error.

Written by the indexing model from the issue text.