'List all Health Checks in a zone.
:param zone: Zone to list health checks for.
:type zone: :class:`Zone`
:return: ``list`` of :class:`AuroraDNSHealthCheck`'

def ex_list_healthchecks(self, zone):

    healthchecks = []
    self.connection.set_context({'resource': 'zone', 'id': zone.id})
    res = self.connection.request(('/zones/%s/health_checks' % zone.id))
    for healthcheck in res.parse_body():
        healthchecks.append(self.__res_to_healthcheck(zone, healthcheck))
    return healthchecks
