Function default_renderer 

pub fn default_renderer(
    interuptor: Interrupter,
    checkpoint: Option<usize>,
) -> Box<dyn MetricsRenderer>

Return the default metrics renderer.

This can be either:

• TuiMetricsRenderer, when the tui feature is enabled and stdout is a terminal, or
• CliMetricsRenderer, when the tui feature is not enabled, or stdout is not a terminal.