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    dns.resolveNs(hostname, callback): void
    Attributes
    hostname:string
    callback:Function
    err:Error
    addresses:string[]

    Uses the DNS protocol to resolve name server records (NS records) for the hostname. The addresses argument passed to the callback function will contain an array of name server records available for hostname (e.g. ['ns1.example.com', 'ns2.example.com']).