Get a network interface.

def _get_network_interface(name, resource_group):
    '''
    Get a network interface.
    '''
    public_ips = []
    private_ips = []
    netapi_versions = get_api_versions(kwargs={
        'resource_provider': 'Microsoft.Network',
        'resource_type': 'publicIPAddresses'
        }
    )
    netapi_version = netapi_versions[0]
    netconn = get_conn(client_type='network')
    netiface_query = netconn.network_interfaces.get(
        resource_group_name=resource_group,
        network_interface_name=name
    )

    netiface = netiface_query.as_dict()
    for index, ip_config in enumerate(netiface['ip_configurations']):
        if ip_config.get('private_ip_address') is not None:
            private_ips.append(ip_config['private_ip_address'])
        if 'id' in ip_config.get('public_ip_address', {}):
            public_ip_name = get_resource_by_id(
                ip_config['public_ip_address']['id'],
                netapi_version,
                'name'
            )
            public_ip = _get_public_ip(public_ip_name, resource_group)
            public_ips.append(public_ip['ip_address'])
            netiface['ip_configurations'][index]['public_ip_address'].update(public_ip)

    return netiface, public_ips, private_ips