in src/kvp.rs [280:290]
fn on_new_span(
&self,
_attrs: &Attributes<'_>,
id: &Id,
ctx: TracingContext<'_, S>,
) {
let start_instant = MyInstant::now();
if let Some(span) = ctx.span(id) {
span.extensions_mut().insert(start_instant);
}
}