presto-main/src/main/java/io/prestosql/server/security/KerberosConfig.java/KerberosConfig/setNameType
class KerberosConfig:    @Config("http-server.authentication.krb5.name-type")
    @LegacyConfig("http.server.authentication.krb5.name-type")
    public KerberosConfig setNameType(KerberosNameType nameType)
    {
        this.nameType = nameType;
        return this;
    }