public DirectMessageConfiguration withGCMMessage(GCMMessage gCMMessage) {
        setGCMMessage(gCMMessage);
        return this;
    }
<p>
The default push notification message for the GCM channel, which is used to send notifications through the
Firebase Cloud Messaging (FCM), formerly Google Cloud Messaging (GCM), service. This message overrides the
default push notification message (DefaultPushNotificationMessage).
</p>

@param gCMMessage
       The default push notification message for the GCM channel, which is used to send notifications through the
       Firebase Cloud Messaging (FCM), formerly Google Cloud Messaging (GCM), service. This message overrides the
       default push notification message (DefaultPushNotificationMessage).
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-pinpoint/src/main/java/com/amazonaws/services/pinpoint/model/DirectMessageConfiguration.java