Function rayon_logs::join_context

pub fn join_context<A, B, RA, RB>(oper_a: A, oper_b: B) -> (RA, RB) where
    A: FnOnce(FnContext) -> RA + Send,
    B: FnOnce(FnContext) -> RB + Send,
    RA: Send,
    RB: Send, 

Execute a logging join_context.