Retrofit Instance for network calls in android

RetrofitInstance.kt

        //OkHttpClient
        val okHttpClient: OkHttpClient = OkHttpClient().newBuilder()
            .cache(cache())
            .addInterceptor(httpLoggingInterceptor)
            .addNetworkInterceptor(networkInterceptor) // only used when network is on
            .addInterceptor(offlineCacheInterceptor)
            .build()


        //Retrofit
        val retrofit: Retrofit = Retrofit.Builder()
            .client(okHttpClient)
            .baseUrl(BASE_URL)
            .addConverterFactory(GsonConverterFactory.create(gson))
            .build()
        paymentService = retrofit.create(PaymentService::class.java)