string containing both a certificate and PKCS #8-encoded private key.

    ```kotlin
    val heldCertificate = HeldCertificate.decode("""
        |-----BEGIN CERTIFICATE-----
        |MIIBYTCCAQegAwIBAgIBKjAKBggqhkjOPQQDAjApMRQwEgYDVQQLEwtlbmdpbmVl
        |cmluZzERMA8GA1UEAxMIY2FzaC5hcHAwHhcNNzAwMTAxMDAwMDA1WhcNNzAwMTAx

## Vida útil (_Lifespan_)

Você pode definir essa lógica de *inicialização* e *encerramento* usando os parâmetros de `lifespan` da aplicação `FastAPI`, e um "gerenciador de contexto" (te mostrarei o que é isso a seguir).

Vamos iniciar com um exemplo e ver isso detalhadamente.

Nós criamos uma função assíncrona chamada `lifespan()` com `yield` como este:

```Python hl_lines="16  19"
{!../../../docs_src/events/tutorial003.py!}

all: build

checks: ## check dependencies
	@echo "Checking dependencies"
	@(env bash $(PWD)/buildscripts/checkdeps.sh)

help: ## print this help
	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' Makefile | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-40s\033[0m %s\n", $$1, $$2}'

getdeps: ## fetch necessary dependencies
	@mkdir -p ${GOPATH}/bin

<!-- BEGIN MUNGE: GENERATED_TOC -->

- [v1.28.9](#v1289)
  - [Downloads for v1.28.9](#downloads-for-v1289)
    - [Source Code](#source-code)
    - [Client Binaries](#client-binaries)
    - [Server Binaries](#server-binaries)
    - [Node Binaries](#node-binaries)
    - [Container Images](#container-images)
  - [Changelog since v1.28.8](#changelog-since-v1288)
  - [Important Security Information](#important-security-information)

<!-- BEGIN MUNGE: GENERATED_TOC -->

- [v1.30.0](#v1300)
  - [Downloads for v1.30.0](#downloads-for-v1300)
    - [Source Code](#source-code)
    - [Client Binaries](#client-binaries)
    - [Server Binaries](#server-binaries)
    - [Node Binaries](#node-binaries)
    - [Container Images](#container-images)
  - [Changelog since v1.29.0](#changelog-since-v1290)
  - [Changes by Kind](#changes-by-kind)
    - [Deprecation](#deprecation)

* <a href="https://www.linkedin.com/in/tiangolo/" class="external-link" target="_blank">Conect-se comigo no **Linkedin**</a>.
    * Saber quando eu fizer novos anúncios ou novas ferramentas (apesar de que uso o twitter com mais frequência 🤷‍♂).

<!-- BEGIN MUNGE: GENERATED_TOC -->

- [v1.29.4](#v1294)
  - [Downloads for v1.29.4](#downloads-for-v1294)
    - [Source Code](#source-code)
    - [Client Binaries](#client-binaries)
    - [Server Binaries](#server-binaries)
    - [Node Binaries](#node-binaries)
    - [Container Images](#container-images)
  - [Changelog since v1.29.3](#changelog-since-v1293)
  - [Important Security Information](#important-security-information)

to preserve the invariant that all packages have distinct paths.
This is necessary to avoid compiler and linker conflicts. Adding
a "vendor/" prefix also maintains the invariant that standard
library packages begin with a dotless path element.

The module requirements of std and cmd do not influence version
selection in other modules. They are only considered when running
module commands like 'go get' and 'go mod vendor' from a directory

# Do not sort: Copybara rule
# copybara:uncomment_begin
# # buildifier: disable=out-of-order-load
# load("//devtools/build_cleaner/skylark:action_config_test.bzl", "action_config_test")
# load("//devtools/copybara/rules:copybara.bzl", "copybara_config_test")
# load("@rules_license//rules:license.bzl", "license")
# # buildifier: enable=out-of-order-load
# copybara:uncomment_end

# copybara:comment_begin(oss-only)

  fun journalWriteFailsDuringEdit(parameters: Pair<FileSystem, Boolean>) {
    setUp(parameters.first, parameters.second)
    set("a", "a", "a")
    set("b", "b", "b")

    // We can't begin the edit if writing 'DIRTY' fails.
    filesystem.setFaultyWrite(journalFile, true)
    assertThat(cache.edit("c")).isNull()

    // Once the journal has a failure, subsequent writes aren't permitted.