void appendMessage(String message);
void show();
int getMessageCount();
void setPopupTopRightCorner();
}
<BUG>private HasErrorNotificationLabel listener;
private static final int MESSAGE_TO_KEEP = 6;</BUG>
private final Timer hidePopupTimer = new Timer()
{
@Override

void appendMessage(String message);
void show();
int getMessageCount();
void setPopupTopRightCorner();
}
private HasNotificationLabel listener;
private static final int MESSAGE_TO_KEEP = 6;
private final Timer hidePopupTimer = new Timer()
{
@Override
