### Question:
ClientChargesApi { public String retrieveTemplate() throws ApiException { ApiResponse<String> resp = retrieveTemplateWithHttpInfo(); return resp.getData(); } ClientChargesApi();  ClientChargesApi(ApiClient apiClient); ApiClient getApiClient(); void setApiClient(ApiClient apiClient); com.squareup.okhttp.Call applyClientChargeCall(Long clientId, PostClientsClientIdChargesRequest body, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener); PostClientsClientIdChargesResponse applyClientCharge(Long clientId, PostClientsClientIdChargesRequest body); ApiResponse<PostClientsClientIdChargesResponse> applyClientChargeWithHttpInfo(Long clientId, PostClientsClientIdChargesRequest body); com.squareup.okhttp.Call applyClientChargeAsync(Long clientId, PostClientsClientIdChargesRequest body, final ApiCallback<PostClientsClientIdChargesResponse> callback); com.squareup.okhttp.Call deleteClientChargeCall(Long clientId, Long chargeId, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener); DeleteClientsClientIdChargesChargeIdResponse deleteClientCharge(Long clientId, Long chargeId); ApiResponse<DeleteClientsClientIdChargesChargeIdResponse> deleteClientChargeWithHttpInfo(Long clientId, Long chargeId); com.squareup.okhttp.Call deleteClientChargeAsync(Long clientId, Long chargeId, final ApiCallback<DeleteClientsClientIdChargesChargeIdResponse> callback); com.squareup.okhttp.Call payOrWaiveClientChargeCall(Long clientId, Long chargeId, PostClientsClientIdChargesChargeIdRequest body, String command, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener); PostClientsClientIdChargesChargeIdResponse payOrWaiveClientCharge(Long clientId, Long chargeId, PostClientsClientIdChargesChargeIdRequest body, String command); ApiResponse<PostClientsClientIdChargesChargeIdResponse> payOrWaiveClientChargeWithHttpInfo(Long clientId, Long chargeId, PostClientsClientIdChargesChargeIdRequest body, String command); com.squareup.okhttp.Call payOrWaiveClientChargeAsync(Long clientId, Long chargeId, PostClientsClientIdChargesChargeIdRequest body, String command, final ApiCallback<PostClientsClientIdChargesChargeIdResponse> callback); com.squareup.okhttp.Call retrieveAllClientChargesCall(Long clientId, String chargeStatus, Boolean pendingPayment, Integer limit, Integer offset, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener); GetClientsClientIdChargesResponse retrieveAllClientCharges(Long clientId, String chargeStatus, Boolean pendingPayment, Integer limit, Integer offset); ApiResponse<GetClientsClientIdChargesResponse> retrieveAllClientChargesWithHttpInfo(Long clientId, String chargeStatus, Boolean pendingPayment, Integer limit, Integer offset); com.squareup.okhttp.Call retrieveAllClientChargesAsync(Long clientId, String chargeStatus, Boolean pendingPayment, Integer limit, Integer offset, final ApiCallback<GetClientsClientIdChargesResponse> callback); com.squareup.okhttp.Call retrieveClientChargeCall(Long clientId, Long chargeId, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener); GetClientsChargesPageItems retrieveClientCharge(Long clientId, Long chargeId); ApiResponse<GetClientsChargesPageItems> retrieveClientChargeWithHttpInfo(Long clientId, Long chargeId); com.squareup.okhttp.Call retrieveClientChargeAsync(Long clientId, Long chargeId, final ApiCallback<GetClientsChargesPageItems> callback); com.squareup.okhttp.Call retrieveTemplateCall(final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener); String retrieveTemplate(); ApiResponse<String> retrieveTemplateWithHttpInfo(); com.squareup.okhttp.Call retrieveTemplateAsync(final ApiCallback<String> callback);  }### Answer:
@Test public void retrieveTemplateTest() throws ApiException { String response = api.retrieveTemplate(); }