presto-jdbc/src/main/java/io/prestosql/jdbc/ConnectionProperties.java/KerberosKeytabPath/KerberosKeytabPath
class KerberosKeytabPath:        public KerberosKeytabPath()
        {
            super("KerberosKeytabPath", NOT_REQUIRED, isKerberosEnabled(), FILE_CONVERTER);
        }