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   Color a CAD Model. This function can be used only to change the colors
   of a CAD model. It is usually used to change colors for an imported
   model.
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   Form:
   g = CADColor( mode, g )
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   ------
   Inputs
   ------
   mode        (1,:) See above
   g           (1,1) Input CAD model

   -------
   Outputs
   -------
   g           (1,1) Output CAD model

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