you shouldn't do that. You declared aggregated_channels: `/items/{{id}}`, `/subjects` (**!** order is important), so you receive in your callback function `get_userstosubjects_and_subjects` params in order `(item_param, subjects_params)`.

These you can use here like
```coffeescript
params =
    # note that it's item, not items, you actually receive data for a specific object
    # because of the {{id}} in the /items/{{id}} in aggregated_channels. That id
    # parameter is taken from the widget's @params.id to resolve the URL into /items/3,
    # you can check that it's there (it's passed by the list which injected the item widget).
    item: item_params
    subjects: subjects_params