### Question:
FakeClassnameTags123Api { public Client testClassname(Client body) throws ApiException { Object localVarPostBody = body; if (body == null) { throw new ApiException(400, "Missing the required parameter 'body' when calling testClassname"); } String localVarPath = "/fake_classname_test".replaceAll("\\{format\\}","json"); List<Pair> localVarQueryParams = new ArrayList<Pair>(); Map<String, String> localVarHeaderParams = new HashMap<String, String>(); Map<String, String> localVarCookieParams = new HashMap<String, String>(); Map<String, Object> localVarFormParams = new HashMap<String, Object>(); final String[] localVarAccepts = { "application/json" }; final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts); final String[] localVarContentTypes = { "application/json" }; final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes); String[] localVarAuthNames = new String[] { "api_key_query" }; GenericType<Client> localVarReturnType = new GenericType<Client>() {}; return apiClient.invokeAPI(localVarPath, "PATCH", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType); } FakeClassnameTags123Api();  FakeClassnameTags123Api(ApiClient apiClient); ApiClient getApiClient(); void setApiClient(ApiClient apiClient); Client testClassname(Client body);  }### Answer:
@Test public void testClassnameTest() throws ApiException { Client client = null; Client response = api.testClassname(client); }