Dependency instead of Module example

DependencyHolderExample.kt

@DependencyHolder
class CatDependencyHolder {
    @Provides
    @AppScope
    fun retrofit(): Retrofit {
        return Retrofit.Builder()
            .baseUrl(BuildConfig.BASE_URL)
            .addConverterFactory(GsonConverterFactory.create())
            .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
            .build()
    }

    @Provides
    @AppScope
    fun catApi(retrofit: Retrofit): CatApi =
        retrofit.create(CatApi::class.java);
}