private void DrawSelectedPointInspector()
        {
            GUILayout.Label("Selected Point");
            EditorGUI.BeginChangeCheck();
            Vector3 point = EditorGUILayout.Vector3Field("Position", _spline.GetControlPoint(_selectedIndex));

            if (EditorGUI.EndChangeCheck())
            {
                Undo.RecordObject(_spline, "Move Point");
                EditorUtility.SetDirty(_spline);
                _spline.SetControlPoint(_selectedIndex, point);
            }

            EditorGUI.BeginChangeCheck();
            BezierControlPointMode mode = (BezierControlPointMode)EditorGUILayout.EnumPopup("Mode", _spline.GetControlPointMode(_selectedIndex));

            if (EditorGUI.EndChangeCheck())
            {
                Undo.RecordObject(_spline, "Change Point Mode");
                _spline.SetControlPointMode(_selectedIndex, mode);
                EditorUtility.SetDirty(_spline);
            }
        }