public override void OnInspectorGUI() {
        if (_target == null) _target = target as DonutGraph;
		DrawDefaultInspector();
		using (gui.Horizontal()) {
			if (gui.EzButton ("Import XML Data", GUILayout.Height (24f))) {
				_target.ImportXML (_idx);				
			}
			_idx = Mathf.Clamp ((gui.EzIntField ("Idx", _idx, 10f, GUILayout.Width (60f))), 1, 4);
		}

		EditorUtility.SetDirty (target);
	}
    public override void OnInspectorGUI()
    {
        if (_target == null)
        {
            _target = target as DonutGraph;
        }
        DrawDefaultInspector();
        using (gui.Horizontal()) {
            if (gui.EzButton("Import XML Data", GUILayout.Height(24f)))
            {
                _target.ImportXML(_idx);
            }
            _idx = Mathf.Clamp((gui.EzIntField("Idx", _idx, 10f, GUILayout.Width(60f))), 1, 4);
        }

        EditorUtility.SetDirty(target);
    }