private void InitPlaybackButtons(Transform buttonPrefab)
        {
            var container = new GameObject("Playback");

            container.transform.SetParent(transform, false);

            var gridLayout = container.AddComponent <HorizontalLayoutGroup>();

            gridLayout.spacing = 4f;
            gridLayout.childForceExpandWidth = false;
            gridLayout.childControlWidth     = true;

            var playAll = Instantiate(buttonPrefab);

            playAll.SetParent(container.transform, false);
            playAll.GetComponent <UIDynamicButton>().label = "\u25B6 Seq";
            playAll.GetComponent <UIDynamicButton>().button.onClick.AddListener(() => _animation.PlayAll());
            playAll.GetComponent <LayoutElement>().preferredWidth = 0;
            playAll.GetComponent <LayoutElement>().flexibleWidth  = 100;

            var playClip = Instantiate(buttonPrefab);

            playClip.SetParent(container.transform, false);
            playClip.GetComponent <UIDynamicButton>().label = "\u25B6 Clip";
            playClip.GetComponent <UIDynamicButton>().button.onClick.AddListener(() => _animation.PlayClip(_animation.current, false));
            playClip.GetComponent <LayoutElement>().preferredWidth = 0;
            playClip.GetComponent <LayoutElement>().flexibleWidth  = 100;

            var stop = Instantiate(buttonPrefab);

            stop.SetParent(container.transform, false);
            stop.GetComponent <UIDynamicButton>().label = "\u25A0 Stop";
            stop.GetComponent <UIDynamicButton>().button.onClick.AddListener(() => { if (_animation.isPlaying)
                                                                                     {
                                                                                         _animation.StopAll();
                                                                                     }
                                                                                     else
                                                                                     {
                                                                                         _animation.ResetAll();
                                                                                     } });
            stop.GetComponent <LayoutElement>().preferredWidth = 0;
            stop.GetComponent <LayoutElement>().flexibleWidth  = 30;
        }