GGPlotD context, to be plotted on figure.
Title of the window. If none given (default), window is named by "Figure id".
If figure with given title exists already, that figure is returned, otherwise new figure is created and returned.
ContextNotInitialized
Plot GGPlotD context onto figure with given title.
Given plot is drawn on top of figure's current image buffer. Size of the figure, and it's image buffer is unchanged. If no figure exists with given title, new one is allocated with default setup (500x500, with black background), and the plot is drawn on it.