code: public RESTData getDataOfImportTask(Integer importJobId, Integer taskId)
          throws Exception {
          final DeserializationFeature unwrapRootValueFeature = DeserializationFeature.UNWRAP_ROOT_VALUE;
          boolean unwrapRootValueFeatureIsEnabled = mapper.isEnabled(unwrapRootValueFeature);
  
          Response httpResponse = HttpUtil.get(
              this.addEndPoint(importJobId + "/tasks/" + taskId + "/data"),
              this.username,
              this.password
          );
  
          // we have to disable the feature. otherwise deserialize would not work here
          mapper.disable(unwrapRootValueFeature);
  
          final RESTData resultEntity = (RESTData) this.asEntity(httpResponse.getBody(), RESTData.class);
  
          if (unwrapRootValueFeatureIsEnabled) {
              mapper.enable(unwrapRootValueFeature);
          }
  
          return resultEntity;
      }
docs: Get the data of an import task.