Graphic is an interface for Graphic library. The idea, that exist in others languages, is to have interface available for diferents graphics libraries : don't change your code, just the library.
Note that due to package transfer, graphic will start from version 1.x for development version and 2.x for stable version.
If you want to use a graphic library, see the next section.
var Graphic =Image = GraphicImage;// implements methods
Graphic is under developement, any minor version of 1.x can broke features.