private ConscryptHostnameVerifier getHttpsVerifier() {
        if (hostnameVerifier != null) {
            return hostnameVerifier;
        }
        if (defaultHostnameVerifier != null) {
            return defaultHostnameVerifier;
        }
        return Platform.getDefaultHostnameVerifier();
    }
Returns the currently-set hostname verifier for this instance.

@see #setHostnameVerifier(ConscryptHostnameVerifier)
common/src/main/java/org/conscrypt/TrustManagerImpl.java