Function tracing::collect::set_default

pub fn set_default<C>(collector: C) -> DefaultGuard where
    C: Collect + Send + Sync + 'static, 

This is supported on crate feature std only.

Sets the collector as the default for the duration of the lifetime of the returned DefaultGuard

The default collector is used when creating a new Span or Event, if no span is currently executing. If a span is currently executing, new spans or events are dispatched to the collector that tagged that span, instead.