docs: private void assertCorrectJobId(Settings settings) {
          SettingsUtils.ensureJobTransportPoolingKey(settings);
          String requestingJobKey = SettingsUtils.getJobTransportPoolingKey(settings);
          if (!jobKey.equals(requestingJobKey)) {
              throw new EsHadoopIllegalArgumentException("Settings object passed does not have the same job " +
                      "pooling key property as when this pool was created. Job key requested was [" +
                      requestingJobKey + "] but this pool services job [" + jobKey + "]. This could be a " +
                      "different job incorrectly polluting the TransportPool. Bailing out...");
          }
      }