A: 8 - ui/example_3/parent_fragment/Example3ParentFragmentModule.java

Example3ParentFragmentModule.java

@Module(includes = {
        BaseFragmentModule.class
},
        subcomponents = Example3ChildFragmentSubcomponent.class)
abstract class Example3ParentFragmentModule {

    // TODO (ContributesAndroidInjector) remove this in favor of @ContributesAndroidInjector
    @Binds
    @IntoMap
    @FragmentKey(Example3ChildFragment.class)
    abstract AndroidInjector.Factory<? extends Fragment>
    example3ChildFragmentInjectorFactory(Example3ChildFragmentSubcomponent.Builder builder);

    ...
}