return ip.addr.xor(p.ip.addr).and(mask6(p.Bits())).isZero()
	}
}

// Overlaps reports whether p and o contain any IP addresses in common.
//
// If p and o are of different address families or either have a zero
// IP, it reports false. Like the Contains method, a prefix with an
// IPv4-mapped IPv6 address is still treated as an IPv6 mask.
func (p Prefix) Overlaps(o Prefix) bool {

			service.Spec.IPFamilyPolicy = &singleStack
			service.Spec.IPFamilies = []api.IPFamily{r.primaryIPFamily}
		}
	} else {
		// Headful: init ipFamilies from clusterIPs.
		service.Spec.IPFamilies = make([]api.IPFamily, len(service.Spec.ClusterIPs))
		for idx, ip := range service.Spec.ClusterIPs {
			if netutil.IsIPv6String(ip) {
				service.Spec.IPFamilies[idx] = api.IPv6Protocol
			} else {

					ClusterIPs: []string{"10.0.0.10"},
					IPFamilies: []v1.IPFamily{v1.IPv4Protocol},
				},
			},
		},

		{
			name:           "service single stack ipv4. want ipv6",
			requestFamily:  v1.IPv6Protocol,
			expectedResult: "",
			service: v1.Service{
				Spec: v1.ServiceSpec{
					ClusterIPs: []string{"10.0.0.10"},
					IPFamilies: []v1.IPFamily{v1.IPv4Protocol},
				},
			},
		},

				t.Errorf("expected clusterIPs %q, got %q", tc.expect.Spec.ClusterIP, result.Spec.ClusterIP)
			}
			if !reflect.DeepEqual(result.Spec.IPFamilies, tc.expect.Spec.IPFamilies) {
				t.Errorf("expected ipFamilies %q, got %q", tc.expect.Spec.IPFamilies, result.Spec.IPFamilies)
			}
			if !reflect.DeepEqual(result.Spec.IPFamilyPolicy, tc.expect.Spec.IPFamilyPolicy) {

	return sameSingular && samePlural
}

func sameIPFamilies(oldSvc, newSvc *api.Service) bool {
	return reflect.DeepEqual(oldSvc.Spec.IPFamilies, newSvc.Spec.IPFamilies)
}

func getIPFamilyPolicy(svc *api.Service) string {
	if svc.Spec.IPFamilyPolicy == nil {
		return ""
	}
	return string(*svc.Spec.IPFamilyPolicy)
}

	var endpointIP string
	ipFamily := v1.IPv4Protocol

	if len(svc.Spec.IPFamilies) > 0 {
		// controller is connected to an api-server that correctly sets IPFamilies
		ipFamily = svc.Spec.IPFamilies[0] // this works for headful and headless
	} else {
		// controller is connected to an api server that does not correctly
		// set IPFamilies (e.g. old api-server during an upgrade)

@app.get("/items/{item_id}")
async def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

**Note**

Si vous n'êtes pas familier avec cette notion, consultez la section _"Vous êtes pressés ?"_ à propos de <a href="https://fastapi.tiangolo.com/fr/async/#vous-etes-presses" target="_blank">`async` et `await` dans la documentation</a>.

</details>

			IncludeExtAuthz: c.IncludeExtAuthz,
			IPFamilies:      "IPv6, IPv4",
			IPFamilyPolicy:  "RequireDualStack",
			DualStack:       true,
		}
		eSvc := echo.Config{
			Service:         ESvc,
			ServiceAccount:  true,
			Ports:           ports.All(),
			Subsets:         []echo.SubsetConfig{{}},
			IncludeExtAuthz: c.IncludeExtAuthz,
			IPFamilies:      "IPv6",
			IPFamilyPolicy:  "SingleStack",

* Técnicas más avanzadas, pero igual de fáciles, para declarar **modelos de JSON profundamente anidados** (gracias a Pydantic).
* Muchas características extra (gracias a Starlette) como:
    * **WebSockets**
    * **GraphQL**
    * pruebas extremadamente fáciles con HTTPX y `pytest`
    * **CORS**
    * **Cookie Sessions**
    * ...y mucho más.

## Rendimiento

		"Service":        cfg.Service,
		"Headless":       cfg.Headless,
		"ServiceAccount": cfg.ServiceAccount,
		"ServicePorts":   cfg.Ports.GetServicePorts(),
		"ServiceLabels":  cfg.ServiceLabels,
		"IPFamilies":     cfg.IPFamilies,
		"IPFamilyPolicy": cfg.IPFamilyPolicy,
	}
}

// createVMConfig sets up a Service account,
func createVMConfig(ctx resource.Context, cfg echo.Config) error {