code: public OperationFuture<List<FirewallPolicy>> update(
              FirewallPolicyFilter firewallPolicyFilter,
              FirewallPolicyConfig config
      ) {
          checkNotNull(firewallPolicyFilter, "Firewall policy filter must be not null");
  
          List<FirewallPolicy> firewallPolicyList = findLazy(firewallPolicyFilter)
              .map(metadata -> FirewallPolicy.refById(
                  metadata.getId(),
                  DataCenter.refById(metadata.getDataCenterId())
              ))
              .collect(toList());
  
          return update(firewallPolicyList, config);
      }
docs: Update filtered firewall policies
  
  @param firewallPolicyFilter firewall policy filter
  @param config firewall policy config
  @return OperationFuture wrapper for firewall policy list