public StopGameSessionPlacementRequest withPlacementId(String placementId) {
        setPlacementId(placementId);
        return this;
    }
<p>
A unique identifier for a game session placement to stop.
</p>

@param placementId
       A unique identifier for a game session placement to stop.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-gamelift/src/main/java/com/amazonaws/services/gamelift/model/StopGameSessionPlacementRequest.java