public ListFirewallsRequest withVpcIds(java.util.Collection<String> vpcIds) {
        setVpcIds(vpcIds);
        return this;
    }
<p>
The unique identifiers of the VPCs that you want Network Firewall to retrieve the firewalls for. Leave this blank
to retrieve all firewalls that you have defined.
</p>

@param vpcIds
       The unique identifiers of the VPCs that you want Network Firewall to retrieve the firewalls for. Leave
       this blank to retrieve all firewalls that you have defined.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-networkfirewall/src/main/java/com/amazonaws/services/networkfirewall/model/ListFirewallsRequest.java