Lookup a host, returning a Future of a list of
InternetAddresss. If type is InternetAddressType.ANY, it
will lookup both IP version 4 (IPv4) and IP version 6 (IPv6)
addresses. If type is either InternetAddressType.IP_V4 or
InternetAddressType.IP_V6 it will only lookup addresses of the
specified type. The order of the list can, and most likely will,
change over time.
Source
external static Future<List<InternetAddress>> lookup(String host,
{InternetAddressType type: InternetAddressType.ANY});