@Override
  public String toString() {
    if (rejectedCoordinators != null) {
      return "FindCoordinatorRequest(memberID=" + memberID + ", rejected=" + rejectedCoordinators
          + ", lastViewId=" + lastViewId + ")";
    } else {
      return "FindCoordinatorRequest(memberID=" + memberID + ")";
    }
  }
FindCoordinatorRequest is a message intended to be sent via a TcpClient to a Locator.
It is used during startup to discover the cluster's membership coordinator.
geode-membership/src/main/java/org/apache/geode/distributed/internal/membership/gms/locator/FindCoordinatorRequest.java