void SetupInteractablesTree()
        {
            var interactionManager = FindObjectOfType <XRInteractionManager>();

            if (interactionManager != null)
            {
                m_InteractablesTree = XRInteractablesTreeView.Create(interactionManager, ref m_InteractablesTreeState, ref m_InteractablesTreeHeaderState);
                m_InteractablesTree.ExpandAll();
            }
        }
        void UpdateInteractablesTree()
        {
            var activeManagers = XRInteractionManager.activeInteractionManagers;

            if (m_InteractablesTree == null)
            {
                m_InteractablesTree = XRInteractablesTreeView.Create(activeManagers, ref m_InteractablesTreeState, ref m_InteractablesTreeHeaderState);
                m_InteractablesTree.ExpandAll();
            }
            else
            {
                m_InteractablesTree.UpdateManagersList(activeManagers);
            }
        }