Function xi_trace::trace_block_payload

pub fn trace_block_payload<'a, S, C, P>(
    name: S, 
    categories: C, 
    payload: P
) -> SampleGuard<'a> where
    S: Into<StrCow>,
    C: Into<CategoriesT>,
    P: Into<TracePayloadT>, 

See trace_block for how the block works and trace_payload for a discussion on payload.