code: @BetaApi
    public final Operation deleteFirewall(String firewall) {
  
      DeleteFirewallHttpRequest request =
          DeleteFirewallHttpRequest.newBuilder().setFirewall(firewall).build();
      return deleteFirewall(request);
    }
docs: Deletes the specified firewall.
  
  <p>Sample code:
  
  <pre><code>
  try (FirewallClient firewallClient = FirewallClient.create()) {
  ProjectGlobalFirewallName firewall = ProjectGlobalFirewallName.of("[PROJECT]", "[FIREWALL]");
  Operation response = firewallClient.deleteFirewall(firewall.toString());
  }
  </code></pre>
  
  @param firewall Name of the firewall rule to delete.
  @throws com.google.api.gax.rpc.ApiException if the remote call fails