def METHOD_NAME(self):
    tags = self.user_tags + self.check_tags
    data = self.api.get_apic_capacity_limits()
    for d in data:
        attr = d.get('fvcapRule', {}).get('attributes', {})
        value = attr.get('constraint', 0)
        subj = attr.get('subj')
        dd_metric = aci_metrics.APIC_CAPACITY_LIMITS.get(subj)
        if dd_metric:
            self.gauge(dd_metric, value, tags=tags)