You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: certificate.rs
    path of file: ./repos/rust-libp2p/transports/webrtc/src/tokio
    
    the code of the file until where you have to start completion: // Copyright 2022 Parity Technologies (UK) Ltd.
//
// Permission is hereby granted, free of charge, to an
    
    pub fn fingerprint(&self) -> Fingerprint {
        let fingerprints = self.inner.get_fingerprints();
        let sha256_fingerprint = fingerprints
            .iter()
            .find(|f| f.algorithm == "sha-256")
            .expect("a SHA-256 fingerprint");

        Fingerprint::try_from_rtc_dtls(sha256_fingerprint).expect("we filtered by sha-256")
    }