* 서로 다른 장소에서 **매개변수** 선언: **헤더**, **쿠키**, **폼 필드** 그리고 **파일**.
* `maximum_length` 또는 `regex`처럼 **유효성 제약**하는 방법.
* 강력하고 사용하기 쉬운 **<abbr title="컴포넌트, 리소스, 제공자, 서비스, injectables라 알려진">의존성 주입</abbr>** 시스템.
* **OAuth2** 지원을 포함한 **JWT tokens** 및 **HTTP Basic**을 갖는 보안과 인증.
* (Pydantic 덕분에) **깊은 중첩 JSON 모델**을 선언하는데 더 진보한 (하지만 마찬가지로 쉬운) 기술.
* (Starlette 덕분에) 많은 추가 기능:
    * **웹 소켓**
    * **GraphQL**
    * HTTPX 및 `pytest`에 기반한 극히 쉬운 테스트
    * **CORS**

* سیستم **<abbr title="also known as components, resources, providers, services, injectables">Dependency Injection</abbr>** قوی و کاربردی.
* امنیت و تایید هویت, شامل پشتیبانی از **OAuth2** مبتنی بر **JWT tokens** و **HTTP Basic**.
* تکنیک پیشرفته برای تعریف **مدل‌های چند سطحی JSON** (بر اساس Pydantic).
* قابلیت‌های اضافی دیگر (بر اساس Starlette) شامل:
    * **<abbr title="WebSocket">وب‌سوکت</abbr>**
    * **GraphQL**

	// NodesGroup defines the well-known group for all nodes.
	NodesGroup = "system:nodes"
	// NodeBootstrapTokenAuthGroup specifies which group a Node Bootstrap Token should be authenticated in
	NodeBootstrapTokenAuthGroup = "system:bootstrappers:kubeadm:default-node-token"
	// KubeProxyClusterRoleName sets the name for the kube-proxy ClusterRole
	KubeProxyClusterRoleName = "system:node-proxier"

}

// op2tok translates syntax.Operators into token.Tokens.
var op2tok = [...]token.Token{
	syntax.Def:  token.ILLEGAL,
	syntax.Not:  token.NOT,
	syntax.Recv: token.ILLEGAL,

	syntax.OrOr:   token.LOR,
	syntax.AndAnd: token.LAND,

	syntax.Eql: token.EQL,
	syntax.Neq: token.NEQ,
	syntax.Lss: token.LSS,
	syntax.Leq: token.LEQ,
	syntax.Gtr: token.GTR,
	syntax.Geq: token.GEQ,

- Allow creating ServiceAccount tokens bound to Node objects.
  This allows users to bind a service account token's validity to a named Node object, similar to Pod bound tokens.

type BootstrapTokenDiscovery struct {
	// Token is a token used to validate cluster information
	// fetched from the control-plane.
	Token string `json:"token" datapolicy:"token"`

	// APIServerEndpoint is an IP or domain name to the API server from which info will be fetched.
	// +optional
	APIServerEndpoint string `json:"apiServerEndpoint,omitempty"`

//    instance_key to distinguish collective groups. In this case, ordering
//    tokens are irrelevant. Each collective group should have a unique
//    instance_key at runtime.
// 2) If at least one ordering token is present, then we purely rely on ordering
//    tokens for side effect modeling and ignore the op-based effect
//    `TF_CollectiveReduceOrderingEffect` for which this function is relevant

			if auth != expectedAuth {
				t.Errorf("bearer token expected: %q, was %q", expectedAuth, auth)
			}
			jws, err := signer.Sign([]byte(claimToResponseMap[claim]))
			if err != nil {
				t.Errorf("while signing response token: %v", err)
			}
			token, err := jws.CompactSerialize()
			if err != nil {
				t.Errorf("while serializing response token: %v", err)
			}
			w.Write([]byte(token))
		default:

	DeleteYAMLFilesDryRun(namespace string, yamlFiles ...string) error

	// CreatePerRPCCredentials creates a gRPC bearer token provider that can create (and renew!) Istio tokens
	CreatePerRPCCredentials(ctx context.Context, tokenNamespace, tokenServiceAccount string, audiences []string,
		expirationSeconds int64) (credentials.PerRPCCredentials, error)

=== Using `CopySpec.filter()`

Transforming the content of files while they are being copied involves basic templating that uses token substitution, removal of lines of text, or even more complex filtering using a full-blown template engine.