in akd/src/ecvrf/tests.rs [282:291]
fn test_privatekey_clone() {
// PrivateKey (aka SecretKey) uses a custom implementation of clone wherein
// the cloned key is created from the bytes of the original
for tv in TESTVECTORS.iter() {
let orig = from_string!(VRFPrivateKey, tv.SK);
let clone = orig.clone();
// the same bytes comprise both keys
assert_eq!(orig.as_bytes(), clone.as_bytes());
}
}