AndroidKotlinRetrofit.kt

object Api {
    val instance: RestAPI = Retrofit.Builder().run {
        baseUrl(AppConst.API.BASE_URL)
        addCallAdapterFactory(RxJavaCallAdapterFactory.create())
        addConverterFactory(JacksonConverterFactory.create(ObjectMapper()))
        client(OkHttpClient.Builder()
                .apply {
                    addInterceptor(HttpLoggingInterceptor()
                            .apply { level = HttpLoggingInterceptor.Level.BODY })
                            .takeIf { BuildConfig.DEBUG }
                }
                .build())
        build()
    }.create(RestAPI::class.java)
}