child should be removed in favor of value<T>

[stargazing-dino]

If you want to be able to do a SlidableAction you can't because it takes in raw strings and IconData:

            SlidableAction(
              label: StringsResource.systemRemove, // String
              backgroundColor: colors.eventLevel4,
              icon: icons.delete, // IconData
              onPressed: (context) async {
                await maybeOnDeleteDevice();
              },
            ),

Instead our buttonBuilder should be

AsyncButtonBuilder<T>(
  value: T,
  loadingValue: T,
  builder: (context, T value, _, __) {
    // ...
  },
)

We can do an internal check to see if the type is a Widget and provide defaults such as loading widgets etc.

I'm not sure on this though I'll let it settle in my mind.