public GameServerInstance withInstanceId(String instanceId) {
        setInstanceId(instanceId);
        return this;
    }
<p>
The unique identifier for the instance where the game server is running. This ID is available in the instance
metadata. EC2 instance IDs use a 17-character format, for example: <code>i-1234567890abcdef0</code>.
</p>

@param instanceId
       The unique identifier for the instance where the game server is running. This ID is available in the
       instance metadata. EC2 instance IDs use a 17-character format, for example:
       <code>i-1234567890abcdef0</code>.
@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/GameServerInstance.java