code: def delete_firewall_rule(self, firewall_rule):
          '''
          Deletes the specified firewall rule
          '''
          firewall_rule_id = self._find_firewall_rule_id(firewall_rule)
          ret = self.network_conn.delete_firewall_rule(firewall_rule_id)
          return ret if ret else Truf delete_firewall_rule(self, firewall_rule):
          '''
          Deletes the specified firewall rule
          '''
          firewall_rule_id = self._find_firewall_rule_id(firewall_rule)
          ret = self.network_conn.delete_firewall_rule(firewall_rule_id)
          return ret if ret else True
docs: Deletes the specified firewall rule