public java.util.List<GameProperty> getGameProperties() {
        return gameProperties;
    }
<p>
A set of key-value pairs that can store custom data in a game session. For example:
<code>{"Key": "difficulty", "Value": "novice"}</code>.
</p>

@return A set of key-value pairs that can store custom data in a game session. For example:
        <code>{"Key": "difficulty", "Value": "novice"}</code>.
aws-java-sdk-gamelift/src/main/java/com/amazonaws/services/gamelift/model/StartGameSessionPlacementRequest.java