import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
private static final class Proxy implements Externalizable {
private static final long serialVersionUID = 1L;
private ClientIdentifier clientId;
private static final class Proxy implements Externalizable {
private static final long serialVersionUID = 1L;
private ClientIdentifier clientId;