docs: public ApiResponse<UploadIdEnvelope> uploadCSVWithHttpInfo(String dtid, byte[] file) throws ApiException {
          com.squareup.okhttp.Call call = uploadCSVValidateBeforeCall(dtid, file, null, null);
          Type localVarReturnType = new TypeToken<UploadIdEnvelope>(){}.getType();
          return apiClient.execute(call, localVarReturnType);
      }