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Image_Graph_Common | --Image_Graph_Element | --Image_Graph_Layout | --Image_Graph_Layout_Plotarea
Image_Graph_PlotareaLayout creates a Image_Graph_Plotarea with assoiated layout's for a title, an X-axis title and a Y-axis title.
Image_Graph_Layout_Plotarea &Image_Graph_Layout_Plotarea( string $title, string $axisXTitle, string $axisYTitle)
Image_Graph_Plotarea &getPlotarea( )