Function stream_failure_details_opening 

pub fn stream_failure_details_opening<'a>(
    error: &'a (dyn Error + 'static),
    open: impl Fn(&'a (dyn Error + 'static)) -> Option<&'a (dyn Error + 'static)>,
) -> Option<StreamFailureDetails>

stream_failure_details for errors that can hold a transparent wrapper this module cannot name. open returns such a wrapper’s inner error, which the wrapper’s source() skips, and None for every other error.