SslContext determineSslContext(SessionProtocol desiredProtocol) {
        return desiredProtocol.isExplicitHttp1() ? sslCtxHttp1Only : sslCtxHttp1Or2;
    }
Determine {@link SslContext} by the specified {@link SessionProtocol}.
core/src/main/java/com/linecorp/armeria/client/Bootstraps.java