} catch (Exception e) { // sneaky checked exception
      // Default toString() behavior - see Object.toString()
      String objectToString =
          o.getClass().getName() + '@' + Integer.toHexString(System.identityHashCode(o));
      // Logger is created inline with fixed name to avoid forcing Proguard to create another class.
      Logger.getLogger("com.google.common.base.Strings")

    } catch (Exception e) { // sneaky checked exception
      // Default toString() behavior - see Object.toString()
      String objectToString =
          o.getClass().getName() + '@' + Integer.toHexString(System.identityHashCode(o));
      // Logger is created inline with fixed name to avoid forcing Proguard to create another class.
      Logger.getLogger("com.google.common.base.Strings")

    private final List<?> s;

    public SameListInstance(List<?> s) {
      this.s = checkNotNull(s);
    }

    @Override
    public int hashCode() {
      return System.identityHashCode(s);
    }

    @Override
    public boolean equals(@Nullable Object obj) {
      if (obj instanceof SameListInstance) {
        SameListInstance that = (SameListInstance) obj;

        this.flags = WITNESS_REGISTER_IP_NOTIFICATION;
    }
    
    private String generateRegistrationId() {
        return "REG-" + System.currentTimeMillis() + "-" + 
               Integer.toHexString(System.identityHashCode(this));
    }
    
    public long getNextSequenceNumber() {
        return sequenceNumber.incrementAndGet();
    }
    
    public void updateHeartbeat() {