Function init_logging 

pub fn init_logging<T1, T2, T1I, T1O, T2I, T2O, E1, E2>(
    left: &mut T1,
    right: &mut T2,
)
where
    T1: Transport<T1I, T1O, E1>,
    T2: Transport<T2I, T2O, E2>,

Init tracing subscriber and enable logging for given transports.