[[plugin-with-variants]]
== Providing multiple variants of a plugin

Variants of a plugin refer to different flavors or configurations of the plugin that are tailored to specific needs or use cases.
These variants can include different implementations, extensions, or configurations of the base plugin.

você está chegando de outro framework assíncrono que não faz o trabalho descrito acima e você está acostumado a definir triviais *funções de operação de rota* com simples `def` para ter um mínimo ganho de performance (cerca de 100 nanosegundos), por favor observe que no **FastAPI** o efeito pode ser bem o oposto. Nesses casos, é melhor usar `async def` a menos que suas *funções de operação de rota* utilizem código que performem bloqueamento <abbr title="Input/Output: disco lendo ou escrevendo, comunicações...

	// in the OpenAPI schema should be preserved when persisting to storage.
	// apiVersion, kind, metadata and known fields inside metadata are always preserved.
	// This field is deprecated in favor of setting `x-preserve-unknown-fields` to true in `spec.versions[*].schema.openAPIV3Schema`.
	// See https://kubernetes.io/docs/tasks/extend-kubernetes/custom-resources/custom-resource-definitions/#field-pruning for details.
	// +optional

// Time) and AST (Atlantic Standard Time) are different time zones,
// even though they have the same abbreviation.
//
// ICANN has been slowly phasing out invented abbreviation in favor of
// numeric time zones (for example, the Asia/Baghdad time zone
// abbreviation got changed from AST to +03 in the 2017a tzdata
// release); but we still want to make sure that the time package does

	eventTag = monitoring.CreateLabel("event")

	k8sEvents = monitoring.NewSum(
		"pilot_k8s_reg_events",
		"Events from k8s registry.",
	)

	// nolint: gocritic
	// This is deprecated in favor of `pilot_k8s_endpoints_pending_pod`, which is a gauge indicating the number of
	// currently missing pods. This helps distinguish transient errors from permanent ones
	endpointsWithNoPods = monitoring.NewSum(

	readinessFlags  *readinessFlags

	// duration used for graceful shutdown.
	shutdownDuration time.Duration

	// internalStop is closed when the server is shutdown. This should be avoided as much as possible, in
	// favor of AddStartFunc. This is only required if we *must* start something outside of this process.
	// For example, everything depends on mesh config, so we use it there rather than trying to sequence everything
	// in AddStartFunc

	//  Intentionally ignore errors: environ returns a best-effort environment no matter what.
	env, _ := c.environ()
	return env
}

// dedupEnv returns a copy of env with any duplicates removed, in favor of
// later values.
// Items not of the normal environment "key=value" form are preserved unchanged.
// Except on Plan 9, items containing NUL characters are removed, and