ibrahimyilmaz/kiel#40 added syntax to define Diff callback for whole adapter. But you still have no ability to define diff callback for register blocks separately.

There is example of how it may look like:

adapterOf<Animal> {
    register(
        layoutResource = R.layout.item_cat,
        viewHolder = ::CatHolder,
        diff = diff(
            areIt

Current version of traverser is using deprecated way to declare dependencies, which uses older testCompile instead of testImplementation.

Most likely there are other features, which can be used from latest Gradle 6.x version.

build.gradle needs to be updated.

visit currently simply panic!'s on errors.