docs: public int getConnectionRetryTimeout() {
      int retval;
      if (containsKey(CONNECTION_RETRY_TIMEOUT_MS_PROP)) {
        retval = getInt(CONNECTION_RETRY_TIMEOUT_MS_PROP, CONNECTION_RETRY_TIMEOUT_MS_DEFAULT);
      } else {
        retval = getInt(CLIENT_RETRY_TIMEOUT_MS_PROP, CONNECTION_RETRY_TIMEOUT_MS_DEFAULT);
      }
      Preconditions.checkArgument(retval >= -1, CONNECTION_RETRY_TIMEOUT_MS_PROP + " must be >= -1");
      return retval;
    }