I have a this `Scaffold` with body:

```
body: new Column(
        children: <Widget>[
          new Flexible(
            child: new FirebaseAnimatedList(
              query: FirebaseDatabase.instance
                  .reference()
                  .child('products')
                  .orderByChild('order'),
              padding: new EdgeInsets.all(8.0),
              reverse: false,
              itemBuilder: (_, DataSnapshot snapshot,
                  Animation<double> animation, int x) {
                return new ProductItem(
                    snapshot: snapshot, animation: animation);
              },
            ),
          ),
        ],
      ),

```

but I need to add a simple query: `'Active' = true`

Is it possible? How? Any example/tutorial?

Thanks.