pub fn draw_packet_sent_received_plot<'a, DB: DrawingBackend + 'a>(
is_sent: bool,
filename: &str,
params: &PlotParameters,
ss: &SeriesStore,
plot: &DrawingArea<DB, Shift>,
) -> ChartContext<'a, DB, Cartesian2d<RangedCoordf64, RangedCoordu64>>