custom sync question

protected override void OnRealtimeModelReplaced(ColorSyncModel previousModel, ColorSyncModel currentModel) {
        if (previousModel != null) {
            // Unregister from events
            previousModel.colorDidChange -= ColorDidChange;
        }
        
        if (currentModel != null) {
            // If this is a model that has no data set on it, populate it with the current mesh renderer color.
            if (currentModel.isFreshModel)
                currentModel.color = _meshRenderer.material.color;
        
            // Update the mesh render to match the new model
            UpdateMeshRendererColor();

            // Register for events so we'll know if the color changes later
            currentModel.colorDidChange += ColorDidChange;
        }
    }