CustomerDetailPresenter.kt

private fun getCustomerDataFromApi() {
        customerUsecase.getCustomerData()
                .observeOn(AndroidSchedulers.mainThread())
                .doOnSubscribe { view.showLoader() }
                .doOnEvent { _, _ -> view.hideLoader() }
                .subscribe(
                        {
                            view.populateData(it)
                        },
                        { e ->
                            Log.e(TAG(), e.message, e)
                            if (e is NetworkError) {
                                view.showError(e.toModel())
                            } else {
                                view.showCustomError()
                            }
                        }
                        )
    }