public static TlsKeyPair of(PrivateKey key, X509Certificate... certificateChain) {
        requireNonNull(certificateChain, "certificateChain");
        return of(key, ImmutableList.copyOf(certificateChain));
    }
Creates a new {@link TlsKeyPair} from the specified {@link PrivateKey} and {@link X509Certificate}s.
core/src/main/java/com/linecorp/armeria/common/TlsKeyPair.java