60         let mut keys = HashSet::with_capacity(1 + payloads.len());  in validate()  localVariable
61         keys.insert(root_public_key.to_pem());  in validate()
77             if keys.replace(payload.subject_public_key().to_pem()).is_some() {  in validate()
196         let keys = P256_KEY_PEM[1..4].iter().copied().enumerate();  in chain_validate_valid()  localVariable
197         let payloads = keys.map(|(n, key)| valid_payload(n, key).build().unwrap()).collect();  in chain_validate_valid()
204         let keys = [P256_KEY_PEM[0], P384_KEY_PEM[0]].into_iter().enumerate();  in chain_validate_valid_with_mixed_kinds_of_key()  localVariable
205         let payloads = keys.map(|(n, key)| valid_payload(n, key).build().unwrap()).collect();  in chain_validate_valid_with_mixed_kinds_of_key()
240         let keys = &P256_KEY_PEM[..3];  in chain_validate_fails_with_repeated_subjects()  localVariable
244             valid_payload(0, keys[0]).subject(repeated).build().unwrap(),  in chain_validate_fails_with_repeated_subjects()
245             valid_payload(1, keys[1]).issuer(repeated).build().unwrap(),  in chain_validate_fails_with_repeated_subjects()
246             valid_payload(2, keys[2]).subject(repeated).build().unwrap(),  in chain_validate_fails_with_repeated_subjects()