A: 4 - util/PerChildFragmentUtil.java

PerChildFragmentUtil.java

@PerChildFragment
public final class PerChildFragmentUtil {

    private final Fragment childFragment;

    @Inject
    PerChildFragmentUtil(@Named(BaseChildFragmentModule.CHILD_FRAGMENT) Fragment childFragment) {
        this.childFragment = childFragment;
    }

    public String doSomething() {
        return "PerChildFragmentUtil: " + hashCode()
                + ", child Fragment: " + childFragment.hashCode();
    }
}