if (!msg.hasPlayerListMessage()) {
failOnErrorMessage(msg);
fail("Invalid message.");
}
SubscriptionRequestMessage subscriptionRequest = SubscriptionRequestMessage.newBuilder()
.setSubscriptionAction(SubscriptionAction.unsubscribeGameList)
.build();
msg = PokerTHMessage.newBuilder()
.setMessageType(PokerTHMessageType.Type_SubscriptionRequestMessage)
.setSubscriptionRequestMessage(subscriptionRequest)