void setHostnameVerifier(ConscryptHostnameVerifier verifier) {
        this.hostnameVerifier = verifier;
    }
Set the hostname verifier that will be used for HTTPS endpoint identification.  If
{@code null} (the default), endpoint identification will use the default hostname verifier
set in {@link #setDefaultHostnameVerifier(ConscryptHostnameVerifier)}.
common/src/main/java/org/conscrypt/TrustManagerImpl.java