import java.io.ObjectInput;
import java.io.ObjectOutput;
import javax.annotation.Nonnull;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import javax.annotation.Nonnull;
private static final class Proxy implements Externalizable {
private static final long serialVersionUID = 1L;
private LocalHistoryIdentifier historyId;
private static final class Proxy implements Externalizable {
private static final long serialVersionUID = 1L;
private LocalHistoryIdentifier historyId;