tk 0.1.10

def_widget_opts! {
    TkMessageOpt: (
        // standard
        TkAnchor,
        TkBackground,
        TkBg,
        TkBorderWidth,
        TkBd,
        TkCursor,
        TkFont,
        TkForeground,
        TkHighlightBackground,
        TkHighlightColor,
        TkHighlightThickness,
        TkPadX,
        TkPadY,
        TkRelief,
        TkTakeFocus,
        TkText,
        TkTextVariable,

        // widget-specific
        TkAspect,
        TkJustify,
        TkWidth,
    ),
}