### Question:
CurrencyApi { public GetCurrenciesResponse retrieveCurrencies() throws ApiException { ApiResponse<GetCurrenciesResponse> resp = retrieveCurrenciesWithHttpInfo(); return resp.getData(); } CurrencyApi();  CurrencyApi(ApiClient apiClient); ApiClient getApiClient(); void setApiClient(ApiClient apiClient); com.squareup.okhttp.Call retrieveCurrenciesCall(final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener); GetCurrenciesResponse retrieveCurrencies(); ApiResponse<GetCurrenciesResponse> retrieveCurrenciesWithHttpInfo(); com.squareup.okhttp.Call retrieveCurrenciesAsync(final ApiCallback<GetCurrenciesResponse> callback); com.squareup.okhttp.Call updateCurrenciesCall(PutCurrenciesRequest body, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener); PutCurrenciesResponse updateCurrencies(PutCurrenciesRequest body); ApiResponse<PutCurrenciesResponse> updateCurrenciesWithHttpInfo(PutCurrenciesRequest body); com.squareup.okhttp.Call updateCurrenciesAsync(PutCurrenciesRequest body, final ApiCallback<PutCurrenciesResponse> callback);  }### Answer:
@Test public void retrieveCurrenciesTest() throws ApiException { GetCurrenciesResponse response = api.retrieveCurrencies(); }