Function onSyncInstantiate

onSyncInstantiate(callback: SyncInstantiateCallback): () => void
Register a callback that fires when a remote syncInstantiate object is created on this client. Use this to get references to objects spawned by other users.
Parameters
- callback: SyncInstantiateCallback
  Called with the instantiated Object3D, the network model data, and the Needle Engine context in which the instantiate event was received
Returns () => void
An unsubscribe function
Example
```
const unsub = onSyncInstantiate((instance, model, context) => {
  console.log("Remote object created:", instance.name, model.originalGuid, context);
});
// later: unsub();
```
See
- syncInstantiate - Instantiate objects across the network
- syncDestroy - Destroy objects across the network