docs: @BetaApi
    public final Operation insertFirewall(ProjectName project, Firewall firewallResource) {
  
      InsertFirewallHttpRequest request =
          InsertFirewallHttpRequest.newBuilder()
              .setProject(project == null ? null : project.toString())
              .setFirewallResource(firewallResource)
              .build();
      return insertFirewall(request);
    }