Ember DS.hasMany children not showing up with JSON API

I am trying to use the JSON API Adapter with ember-cli 2.5.1 , but I'm having a bit of trouble.

I have a todo-list.js model, which has a "hasMany" relationship to todo-list-item.js. Getting the todo-list, the server returns this:

    {
      "links": {
        "self": "http://localhost:4200/service/v1/todolists/b-tlst-af69786c-cbaf-4df9-a4a3-d8232677006a"
      },
      "data": {
        "type": "todo-list",
        "id": "b-tlst-af69786c-cbaf-4df9-a4a3-d8232677006a",
        "attributes": {
          "name": "b1-TodoList",
          "created-on": 1468474962458,
          "modified-on": 1468474962458
        },
        "relationships": {
          "todolistitems": {
            "data": {
              "type": "todo-list-item",
              "id": "b-todo-b5e3c146-d93a-4f97-8540-875bbcd156ca"
            }
          }
        }
      }
    }

If there had been two TodoListItem children instead of one, the value of that "data" key would have been an array, rather than an object.

After receiving this, I was expecting the Ember Chrome plug-in's "Data" tab to show 1 TodoList and 1 child TodoListItem. Instead, it shows 1 TodoList and 0 TodoListItems.

I note from the Network tab that the browser never makes a request to get the items listed in the "data" section of the response.

Is the relationships section above correct and sufficient?