dnscontrol/pkg/js/parse_tests/033-revextend.js

var REGISTRAR = NewRegistrar('none', 'NONE'); // No registrar.
var BIND = NewDnsProvider('bind', 'BIND');

// Delegating reverse zones
D(REV('1.3.0.0/16'), REGISTRAR,
    DnsProvider(BIND),
    NS(REV('1.3.1.0/24'), "ns1.example.com."),
);
D_EXTEND(REV("1.3.2.0/24"),
    NS(REV("1.3.2.0/24"), "ns2.example.org."),
);