public String getGameSessionData() {
        return this.gameSessionData;
    }
<p>
A set of custom game session properties, formatted as a single string value. This data is passed to a game server
process in the <code>GameSession</code> object with a request to start a new game session (see <a href=
"https://docs.aws.amazon.com/gamelift/latest/developerguide/gamelift-sdk-server-api.html#gamelift-sdk-server-startsession"
>Start a Game Session</a>).
</p>

@return A set of custom game session properties, formatted as a single string value. This data is passed to a
        game server process in the <code>GameSession</code> object with a request to start a new game session
        (see <a href=
        "https://docs.aws.amazon.com/gamelift/latest/developerguide/gamelift-sdk-server-api.html#gamelift-sdk-server-startsession"
        >Start a Game Session</a>).
aws-java-sdk-gamelift/src/main/java/com/amazonaws/services/gamelift/model/StartGameSessionPlacementRequest.java