private void OnGUI()
        {
            ModeToggle();

            switch (m_Mode)
            {
            case Mode.Folders:
                m_AssetFolderTab.OnGUI(GetSubWindowArea());
                break;

            case Mode.Builder:
                m_BuildTab.OnGUI(GetSubWindowArea());
                break;

            case Mode.Inspect:
                m_InspectTab.OnGUI(GetSubWindowArea());
                break;

            case Mode.Browser:
            default:
                m_ManageTab.OnGUI(GetSubWindowArea());
                break;
            }
        }