private void Awake()
        {
            _enteredInstances = new List <GPUInstancerPrefab>();
            _collider         = GetComponent <Collider>();

            if (prefabManager == null)
            {
                prefabManager = FindObjectOfType <GPUInstancerPrefabManager>();
            }

            if (prefabManager != null)
            {
                prefabManager.AddModificationCollider(this);
            }
            else
            {
                Debug.LogWarning("GPUInstancerModificationCollider does not have a GPUInstancerPrefabManager defined.");
            }
        }