Function required
fn required<S: serde::Serializer>(span: &crate::Span, se: S) -> Result<<S as >::Ok, <S as >::Error>Serialize a required Span in the friendly duration format
using compact designators.
requiredfn required<S: serde::Serializer>(span: &crate::Span, se: S) -> Result<<S as >::Ok, <S as >::Error>Serialize a required Span in the friendly duration format
using compact designators.