Function trace_leak 

pub fn trace_leak<'a>(
    events: &'a [DisclosureEvent],
    leaked: &DisclosureFingerprint,
) -> Option<&'a DisclosureEvent>

Trace a leak by its fingerprint — the disclosure it came from — making the betrayal knowable. A leaked copy (or knowledge recovered from a leak) carrying leaked is matched to the exact disclosure, and thence to the accountable_actor (the authority, or their staffer).