@Override
  public String toString() {
    return "GatewayEventProcessor[" + "gatewaySenderId=" + sender.getId()
        + ";remoteDSId=" + getSender().getRemoteDSId() + ";batchSize="
        + getSender().getBatchSize()
        + "]";
  }
Call to check if a cleanup of tokens needs to be done
geode-core/src/main/java/org/apache/geode/internal/cache/wan/serial/SerialGatewaySenderEventProcessor.java