### Question:
ReportMailingJobsApi { public GetReportMailingJobsResponse retrieveReportMailingJob(Long entityId) throws ApiException { ApiResponse<GetReportMailingJobsResponse> resp = retrieveReportMailingJobWithHttpInfo(entityId); return resp.getData(); } ReportMailingJobsApi();  ReportMailingJobsApi(ApiClient apiClient); ApiClient getApiClient(); void setApiClient(ApiClient apiClient); com.squareup.okhttp.Call createReportMailingJobCall(PostReportMailingJobsRequest body, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener); PostReportMailingJobsResponse createReportMailingJob(PostReportMailingJobsRequest body); ApiResponse<PostReportMailingJobsResponse> createReportMailingJobWithHttpInfo(PostReportMailingJobsRequest body); com.squareup.okhttp.Call createReportMailingJobAsync(PostReportMailingJobsRequest body, final ApiCallback<PostReportMailingJobsResponse> callback); com.squareup.okhttp.Call deleteReportMailingJobCall(Long entityId, DeleteReportMailingJobsRequest body, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener); DeleteReportMailingJobsResponse deleteReportMailingJob(Long entityId, DeleteReportMailingJobsRequest body); ApiResponse<DeleteReportMailingJobsResponse> deleteReportMailingJobWithHttpInfo(Long entityId, DeleteReportMailingJobsRequest body); com.squareup.okhttp.Call deleteReportMailingJobAsync(Long entityId, DeleteReportMailingJobsRequest body, final ApiCallback<DeleteReportMailingJobsResponse> callback); com.squareup.okhttp.Call retrieveAllReportMailingJobsCall(Integer offset, Integer limit, String orderBy, String sortOrder, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener); List<GetReportMailingJobsResponse> retrieveAllReportMailingJobs(Integer offset, Integer limit, String orderBy, String sortOrder); ApiResponse<List<GetReportMailingJobsResponse>> retrieveAllReportMailingJobsWithHttpInfo(Integer offset, Integer limit, String orderBy, String sortOrder); com.squareup.okhttp.Call retrieveAllReportMailingJobsAsync(Integer offset, Integer limit, String orderBy, String sortOrder, final ApiCallback<List<GetReportMailingJobsResponse>> callback); com.squareup.okhttp.Call retrieveReportMailingJobCall(Long entityId, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener); GetReportMailingJobsResponse retrieveReportMailingJob(Long entityId); ApiResponse<GetReportMailingJobsResponse> retrieveReportMailingJobWithHttpInfo(Long entityId); com.squareup.okhttp.Call retrieveReportMailingJobAsync(Long entityId, final ApiCallback<GetReportMailingJobsResponse> callback); com.squareup.okhttp.Call retrieveReportMailingJobTemplateCall(final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener); GetReportMailingJobsTemplate retrieveReportMailingJobTemplate(); ApiResponse<GetReportMailingJobsTemplate> retrieveReportMailingJobTemplateWithHttpInfo(); com.squareup.okhttp.Call retrieveReportMailingJobTemplateAsync(final ApiCallback<GetReportMailingJobsTemplate> callback); com.squareup.okhttp.Call updateReportMailingJobCall(Long entityId, PutReportMailingJobsRequest body, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener); PutReportMailingJobsResponse updateReportMailingJob(Long entityId, PutReportMailingJobsRequest body); ApiResponse<PutReportMailingJobsResponse> updateReportMailingJobWithHttpInfo(Long entityId, PutReportMailingJobsRequest body); com.squareup.okhttp.Call updateReportMailingJobAsync(Long entityId, PutReportMailingJobsRequest body, final ApiCallback<PutReportMailingJobsResponse> callback);  }### Answer:
@Test public void retrieveReportMailingJobTest() throws ApiException { Long entityId = null; GetReportMailingJobsResponse response = api.retrieveReportMailingJob(entityId); }