presto-hive/src/main/java/io/prestosql/plugin/hive/authentication/CachingKerberosHadoopAuthentication.java/CachingKerberosHadoopAuthentication/CachingKerberosHadoopAuthentication
class CachingKerberosHadoopAuthentication:    public CachingKerberosHadoopAuthentication(KerberosHadoopAuthentication delegate)
    {
        this.delegate = requireNonNull(delegate, "hadoopAuthentication is null");
    }