int svg_io_graph(struct plot *plot, struct graph_dot_data *gdd, char *color);
int svg_line_graph(struct plot *plot, struct graph_line_data *gld, char *color, int thresh1, int thresh2);
int svg_io_graph(struct plot *plot, struct graph_dot_data *gdd, char *color);
int svg_line_graph(struct plot *plot, struct graph_line_data *gld, char *color, int thresh1, int thresh2);