Image_Graph_Common | --Image_Graph_Element | --Image_Graph_Marker | --Image_Graph_Marker_Value
Image_Graph_Marker_Value &Image_Graph_Marker_Value( [int $useValue = IMAGE_GRAPH_VALUE_X])
void setBackground( Image_Graph_Fill &$background)
void setBackgroundColor( int $red, [int $green = false], [int $blue = false])
Image_Graph_DataPreprocessor &setDataPreprocessor( DataPreprocessor &$dataPreprocessor)