ntk widgetImage command implemented as ::ntk::widgetImage::Image ensemble width subcommands

Subcommands:

    :   '''ntk widgetImage blend''' ''dstWidgetImage''
    :   '''ntk widgetImage blendwidget''' ''dstWidgetImage destX destY'' ?''srcX1 srcY1 srcX2 srcY2''? ''srcWidgetImage''
    :   '''ntk widgetImage clipcopy''' ''dstWidgetImage destX destY srcX srcY srcWidgetImage''
    :   '''ntk widgetImage create''' ''width height''
    :   '''ntk WidgetImage createtext''' ''dstWidgetImage font fontsize text textcolor widthVar heightVar''
    :   '''ntk widgetImage fill''' ''dstWidgetImage rgbaList''
    :   '''ntk widgetImage getdata''' ''dstWidgetImage''
    :   '''ntk widgetImage getsize''' ''dstWidgetImage''
    :   '''ntk widgetImage line''' ''dstWidgetImage x1 y1 x2 y2 rgbaList''
    :   '''ntk widgetImage measuretext''' ''dstWidgetImage font fontsize text widthVar heightVar''
    :   '''ntk widgetImage pixel''' ''dstWidgetImage x y''
    :   '''ntk widgetImage polygon''' ''dstWidgetImage rgbaList x1 y1 x2 y2 x3 y3'' ?''xval yval …''?
    :   '''ntk widgetImage rectangle''' ''dstWidgetImage x y width height rgbaList''
    :   '''ntk widgetImage rotate''' ''dstWidgetImage degrees''
    :   '''ntk widgetImage setdata''' ''dstWidgetImage data''
    :   '''ntk widgetImage setsize''' ''dstWidgetImage width height''

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