Spawner Class

public class Spawner : CommunicationBridge

public class MySpawner : MonoBehaviour
{
    public Spawner spawner;

    public GameObject cubePrefab;
    private int _cubeIndex;

    public GameObject spherePrefab;
    private int _sphereIndex;

    // Since we will create three cubes that we want at different positions and rotations, we create
    // variables that hold that data.
    private readonly Vector3[] _cubeSpawnPositions =
    {
        new Vector3(0, 0, 0),
        new Vector3(1, 0, 1),
        new Vector3(-1, 0, 1),
    };

    private readonly Vector3[] _cubeSpawnRotations =
    {
        new Vector3(0, 0, 0),
        new Vector3(0, 45, 45),
        new Vector3(0, 20, 50),
    };

    private GameObject _spawnedSphere;

    private void Start()
    {
        // We add the prefabs to the SpawnableObjects list.
        spawner.SpawnableObjects.Add(cubePrefab);

        // We also set the index, based on the order we put the prefabs in the list.
        _cubeIndex = 0;

        spawner.SpawnableObjects.Add(spherePrefab);
        _sphereIndex = 1;
    }

    public void SpawnSphereOnAllClients()
    {
        // We spawn the sphere prefab using its index in the SpawnableObjects array.
        // Additionally, we store the spawned sphere so we can despawn it later.
        _spawnedSphere = spawner.Spawn(_sphereIndex);

        // Alternatively, we can spawn the prefab using its name.
        // spawner.Spawn("Sphere");
    }

    public void SpawnCubesOnAllClients()
    {
        for(int i = 0; i < 3; i++)
        {
            // We spawn the cubes using different positions and rotations.
            spawner.Spawn(_cubeIndex, _cubeSpawnPositions[i], _cubeSpawnRotations[i]);
        }
    }

    public void DespawnSphereOnAllClients()
    {
        // We despawn the previously spawned sphere on all clients.
        spawner.Despawn(_spawnedSphere);
    }
}