SingleNetworkEntitySpawner

public class SingleNetworkEntitySpawner : MonoBehaviour
{
    public float spawnTimer = 0;
    public float spawnTimerMax = 5;
    public bool needToSpawn = true;
    public NetworkEntityType networkEntityType;
//...

If you need to spawn a NetworkEntity of a particular type once from a spawner location in a game, this class is a helper for that. You can set its timer values, which only tick down if needToSpawn is true. Currently this is being used to spawn in the GlobKing on the example maps.