@staticmethod
def construct_subnet_id(subscription_id, resource_group_name,
    virtual_network_name, subnet_name):
    """construct subnet id"""
    return (
        '/subscriptions/{}/resourceGroups/{}/providers/Microsoft.Network/virtualNetworks/{}/subnets/{}'
        .format(subscription_id, resource_group_name, virtual_network_name,
        subnet_name))
