@classmethod
def delete_floatingip(cls, floating_ip, client=None):
    """Delete floating IP

        :param client: Client to be used
        If client is not given it will use the client used to create
        the floating IP, or cls.client if unknown.
        """
    client = client or floating_ip.get('client') or cls.client
    client.delete_floatingip(floating_ip['id'])
