Documenting RESTful APIs with Spring REST Docs

Documenting RESTful APIs with
Spring REST Docs
By Jenn Strater
@codeJENNerator
1

Unless otherwise indicated, these slides are © 2013-2016 Pivotal Software, Inc. and licensed under a Creative Commons
Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Notes For Those Viewing These Slides Online
• Bulleted text like this indicates the key points mentioned on a previous slide.
They may not have been included in the official presentation.
• If this view does not support links, the links will work in the pdf. In speakerdeck,
you can click the ‘download pdf’ button at the right.
X

Outline
• API Documentation Background
• Approaches to Documentation
• Considerations
2
• Test-Driven Documentation
• Spring REST Docs
• Examples

Follow Along
https://speakerdeck.com/jlstrater/test-driven-docs-springone-2017
https://github.com/jlstrater/groovy-spring-boot-restdocs-example
https://github.com/ratpack/example-books
https://github.com/jlstrater/spring-restdocs-public-api-example
3

Follow Along
https://github.com/ratpack/example-books
https://github.com/jlstrater/spring-restdocs-public-api-example
5

6

About Me
• Co-founder of Gr8Ladies and talk about women in the Groovy Community all
over the world
• Passionate about bring new people into the Groovy community through free
introductory workshops called Gr8Workshops.
• Senior Engineer at Zenjob as of June 2017. We’re hiring! zenjob.de/careers
• Spent the 2016-2017 academic year in Copenhagen working on OSS and
taking classes through a Fulbright Grant.
• Prior to the Fulbright Grant, I was a senior consultant at Object Partners, Inc. in
Minneapolis, MN, USA. My work with Spring REST Docs started on a project at
my client through them.
X

Audience Background
• Creating RESTful APIs
• Spring Boot
• Grails
• Ratpack
7
• API Documentation
• Wiki Pages, Word Documents,
Confluence, etc
• Asciidoc / Asciidoctor
• Swagger / RAML

8
src: https://ﬂic.kr/p/rehEf5

8
src: https://ﬂic.kr/p/rehEf5
I hate writing documentation!*

REST Maturity Model
10
src: http://martinfowler.com/articles/richardsonMaturityModel.html

REST Maturity Model
• I’m not really a fan of the right vs wrong REST debate, but I like this
categorization of APIs.
• Most of our APIS were level one or two, but we wanted to have the flexibility to
use hypermedia
• Spring REST docs includes support for level 3 / hypermedia
• Swagger 2.0 did not support hypermedia. Swagger 3.0 (released end of July
2017) now does
X

11
Attribution: @Alvaro_Sanchez

Monolith vs Microservices
As architecture evolves, many companies move from a central monolith to micro
services or maybe even gateways and multi-tiered architectures.
• For documentation, it was important to have:
• a consistent look and feel
• a way to show how the services can work together
X

Central Information
12
Security
Http Verbs
Error
Handling
Http
Status

Central Information
Central Information
• For example, security tokens, patterns for error messages, http verbs/status codes,
etc
• This information needs to be written out and deﬁned once; not on every endpoint.
X

14

15

Central Information
Who’s seen this before? Of the people who have never used swagger before, how many
understand what this means? Even our CTO who is technical, didn’t want to spend time figuring
it out. Also, product teams.
This is a swagger ui example but the concept is not limited to Swagger. I have seen many
different APIs document in this way. It’s not just URI centric, but also very developer centric. No
matter whether you leave here choosing Swagger or Spring REST Docs, think about your users!
This is an example from Spring Rest Docs using Asciidoc.
Notice the very different way of organizing information on the second slide. Resource centric
document design organizes information by topic and includes urls in the examples only. The
information from generated solutions isn’t enough. We need the handwritten information too!
X

17

17
Deﬁnitions
Swagger (OpenAPI Speciﬁcation)
RAML

17
Deﬁnitions
RAML
Documentation
AsciiDoc
Markdown
Wikis

17
Deﬁnitions
RAML
Documentation
AsciiDoc
Markdown
Wikis
Swagger UI
Swagger2Markup

17
Deﬁnitions
RAML
Testing
MockMVC
RestAssured
Documentation
AsciiDoc
Markdown
Wikis
Swagger UI
Swagger2Markup

17
Deﬁnitions
RAML
Testing
MockMVC
RestAssured
Documentation
AsciiDoc
Markdown
Wikis
Swagger UI
Swagger2Markup
AssertJ-
Swagger
Contract-First

17
Deﬁnitions
RAML
Testing
MockMVC
RestAssured
Documentation
AsciiDoc
Markdown
Wikis
Swagger UI
Swagger2Markup
Spring
REST
Docs
AssertJ-
Swagger
Contract-First

18

Swagger
Swagger is: — a lot of things
• At the core, it is a way to standardize and deﬁne HTTP APIs over RPC.
• It is very popular because of the many plugins built on top of it for things such
as generating client libraries, generating docs, and much more.
• In earlier versions, it did not support hypermedia. Documenting across micro
services was possible, but required a bit of setup. Depending on the library,
some central information is duplicated.
X

Body Slide - Dark Background
All body text is Proxima Nova Regular
• Subhead (18pt)
• Level Two (18pt)
• Level Three (18pt)
• Level Four (18pt)
Use the “Decrease/Increase Indent”  
tools to change bullet levels
• Click on the Home ribbon, Paragraph tab
Line spacing is set in master slides
19
Automation
img src: https://flic.kr/p/eduUfU

Body Slide - Dark Background
All body text is Proxima Nova Regular
• Subhead (18pt)
• Level Two (18pt)
• Level Three (18pt)
• Level Four (18pt)
Use the “Decrease/Increase Indent”  
tools to change bullet levels
• Click on the Home ribbon, Paragraph tab
Line spacing is set in master slides
20
img src: https://www.flickr.com/photos/
24874528@N04/17125924230
SpringFox

SpringFox
SpringFox:
• Generates a Swagger Speciﬁcation from source
• Is very easy to setup (in simple cases)
• No OpenAPI Spec 3.0 support!
X

Custom Swagger Specification
21
{
"swagger": "2.0",
"info": {
"version": "1",
"title": "My Service",
"contact": {
"name": "Company Name"
},
"license": {}
},
"host": "example.com",
"basepath": "/docs"
}

Swagger UI
22

23

SpringFox UI approaches
• Use SpringFox library
• Copy static ﬁles and customize
X

Customization
25
img src: http://sergiodelamo.es/how-to-secure-your-grails-3-api-with-spring-security-rest-for-grails/

Customization
• For any non-standard conﬁguration, you may have to override the UI.
• As one example, we were adding custom headers for oauth jwt tokens. At the
time, it was not supported with springfox-ui.
X

Object Mapping
26
img src: https://github.com/springfox/springfox/issues/281

27
https://github.com/swagger-api/swagger-core/issues/97

Customization
• In Swagger/OpenAPI Spec 2.0, there was no hypermedia support.
• In OpenAPI Spec 3.0, there is some support for links
X

1 @Secured(‘ROLE_ALLOWED_TO_PERFORM_ACTION’) 
2 @RequestMapping(value = '/v1/serviceName/actionName', method =
3 RequestMethod.POST) 
4 @ApiOperation(value = '/actionName', 
5 notes = 'Enables or disables setting via "1" or "0", respectively') 
6 @ApiResponses(value = [ 
7 @ApiResponse(code = 200, response = CustomSettingResponse, message =
8 ‘Successful setting update'), 
9 @ApiResponse(code = 400, response = ErrorResponse, message = 'Invalid
10 user input'), 
11 @ApiResponse(code = 500, response = ErrorResponse, message = 'Unexpected
12 server error') 
13 ]) 
14 CustomSettingResponse setSetting(@RequestBody CustomModel settingsValue) { 
15 SaveSettingUpdateRequest request = new SaveSettingUpdateRequest ( 
16 settingsValue.fieldOne, 
17 [new TransformedSetting(SettingEnum.POSSIBLE_ENUM_VALUE,
18 new Double(settingsValue.value))] 
19 ) 
20 api.saveUpdatedSetting(request) 
21 }

10 user input'), 
13 ]) 
19 ) 
21 }
Annotation Hell

10 user input'), 
13 ]) 
19 ) 
21 }
Annotation Hell
X

3 RequestMethod.POST)
9 ) 
11 }

31

“Try it” Button Alternatives

33

34

Curl
-> curl 'http://localhost:8080/greetings' -i -H 'Content-Type: text/plain'
HTTP/1.1 200
X-Application-Context: application:8080
Content-Type: application/json;charset=UTF-8
Transfer-Encoding: chunked
Date:Thu, 26 Jan 2017 13:28:19 GMT
[{"id":1,"message":"Hello"},{"id":2,"message":"Hi"},{"id":3,"message":"Hola"},{"id":4,"message":"Olá"},{"id":5,"message":"Hej"}]
35

37
Swagger2Markup
https://github.com/Swagger2Markup/swagger2markup

img src: http://www.elvenspirit.com/elf/wp-content/uploads/2011/10/IMG_3013.jpg
FAIL!

img src: http://www.elvenspirit.com/elf/wp-content/uploads/2011/10/IMG_3013.jpg
FAIL!
AssertJ-Swagger
https://github.com/RobWin/assertj-swagger

Spring Cloud Contract
39

40

40
Deﬁnitions
RAML

40
Deﬁnitions
RAML
Documentation
AsciiDoc
Markdown
Wikis

40
Deﬁnitions
RAML
Documentation
AsciiDoc
Markdown
Wikis
Swagger UI
Swagger2Markup

40
Deﬁnitions
RAML
Testing
MockMVC
RestAssured
Documentation
AsciiDoc
Markdown
Wikis
Swagger UI
Swagger2Markup

40
Deﬁnitions
RAML
Testing
MockMVC
RestAssured
Documentation
AsciiDoc
Markdown
Wikis
Swagger UI
Swagger2Markup
AssertJ-
Swagger
Contract-First

40
Deﬁnitions
RAML
Testing
MockMVC
RestAssured
Documentation
AsciiDoc
Markdown
Wikis
Swagger UI
Swagger2Markup
Spring
REST
Docs
AssertJ-
Swagger
Contract-First

Spring
REST
Docs

Test-Driven Development
Green
Red Refactor

Test-Driven Documentation

Red

Document
Red

Document Green
Red

Document Green
Red Refactor

Winning Solution
https://ﬂic.kr/p/5XiKxU
Winning Solution

Winning Solution
• Ensures documentation matches implementation
• Encourages writing more tests
• Reduces duplication in docs and tests
• Removes annotations from source
X

Spring REST Docs
44
https://ﬂic.kr/p/5XiKxU

Game Changers
45
https://ﬂic.kr/p/9Tiv3U

Game Changers
•Generated code snippets
•Tests fail when documentation is missing or out-of-date
•Rest APIs with Hypermedia
•Ratpack
•Dynamic routing doesn’t work with Swagger
X

About Spring REST Docs
46

projects.spring.io/spring-restdocs
46

@springrestdocs
46

@springrestdocs
https://github.com/spring-projects/spring-restdocs
46

•Start with reading the docs; The written docs are good!
•Overview
•Sponsored by Pivotal
•Project Lead - Andy Wilkinson
•Current Version - 2.0.0 released Nov 28
•Twitter Account and Official Logo
X

• Test-Driven Documentation with Spring REST Docs (Java and Spring Boot) - Spring
I/O 2016 Andy Wilkinson
• Writing comprehensive and guaranteed up-to-date REST API documentation -
SpringOne Platform 2016 Anders Evers
X

Out of the Box
47

Out of the Box
Testing Frameworks
• MockMVC
• RestAssured
• WebTestClient - NEW!
47

Out of the Box
Testing Frameworks
• MockMVC
• RestAssured
• WebTestClient - NEW!
47
Build Tools
• Gradle
• Maven

Out of the Box
48

Out of the Box
Documentation Format
• AsciiDoc
• Markdown
48

Out of the Box
Documentation Format
• AsciiDoc
• Markdown
48
Sample Projects
• Spring Boot
• Grails
• Slate
• TestNG
• And more!

Groovier Spring REST Docs
• Spring Boot
• Ratpack
• Grails
50

Groovier Spring REST Docs Example - Spring Boot
Groovy Spring Boot Project
+ Asciidoctor Gradle plugin
+ Spring REST Docs WebTestClient to Spock tests
+ Add to static assets during build and publish to GitHub pages
51

52

Groovier Spring REST Docs Example - Spring Boot
• Start with lazybones spring boot app
• Add mock endpoints for example
Updated to Spring Boot 2.0.0.M7 and thanks to: https://www.callicoder.com/
reactive-rest-apis-spring-webflux-reactive-mongo/
53

54

Endpoints
@RestController
@RequestMapping('/greetings')
class GreetingsController {
@Autowired
GreetingRepository greetingsRepository
@PostMapping()
Mono<Greeting> createGreeting(@Valid @RequestBody Greeting greeting) {
return greetingsRepository.save(greeting)
}
@GetMapping()
Flux<Greeting> listAllGreetings() {
return greetingsRepository.findAll()
}
@GetMapping('/{id}')
Mono<Greeting> getGreetingById(@PathVariable(value = 'id') String greetingId) {
greetingsRepository.findById(greetingId)
}
}
55

Endpoints
@RestController
@Autowired
@PostMapping()
}
@GetMapping()
}
}
}
55
Create a new Greeting

Endpoints
@RestController
@Autowired
@PostMapping()
}
@GetMapping()
}
}
}
55
List all greetings

Endpoints
@RestController
@Autowired
@PostMapping()
}
@GetMapping()
}
}
}
55
List all greetings
Get a greeting by id

56

AsciiDoc
[introduction]
= Introduction
The Example API is a RESTful web service that shows how Spring REST docs works.
[[overview-http-verbs]]
== HTTP verbs
The Example API tries to adhere as closely as possible to standard HTTP and REST conventions in its
use of HTTP verbs.
|===
| Verb | Usage
| `GET`
| Used to retrieve a resource
| `POST`
| Used to create a new resource
| `PUT`
| Used to update an existing resource, overwrites all fields
57

Asciidoctor Gradle Plugin
58

AsciiDoc Gradle Configuration
apply plugin: 'org.asciidoctor.convert'
asciidoctor {
backends 'html5'
attributes 'source-highlighter' : 'prettify',
'imagesdir':'images',
'toc':'left',
'icons': 'font',
'setanchors':'true',
'idprefix':'',
'idseparator':'-',
'docinfo1':'true',
}
59

60

62

Project Reactor and the WebTestClient
63

Setup
@CompileStatic
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
class BaseControllerSpec extends Specification {
@Autowired
ApplicationContext context
protected WebTestClient webTestClient
void setup() {
this.webTestClient = WebTestClient.bindToApplicationContext(this.context)
.configureClient()
.baseUrl('/greetings')
.build()
}
}
64

Setup
@CompileStatic
@Autowired
void setup() {
.configureClient()
.build()
}
}
64
If context is null,
remember to use
spock-spring!!

WebTestClient Call and Assertions
this.webTestClient.post().uri('/')
.contentType(MediaType.APPLICATION_JSON)
.accept(MediaType.APPLICATION_JSON)
.body(BodyInserters.fromObject('{"message": "Hello SpringOne Platform!"}'))
.exchange()
.expectStatus().isOk()
.expectBody()
.jsonPath('$.id').isNotEmpty()
.jsonPath('$.message').isEqualTo('Hello SpringOne Platform!')
65

66

Spring REST Docs Gradle Configuration
dependencies {
…
testCompile "org.springframework.restdocs:spring-restdocs-webtestclient:${springRestDocsVersion}"
asciidoctor "org.springframework.restdocs:spring-restdocs-asciidoctor:${springRestDocsVersion}"
}
ext {
snippetsDir = file('build/generated-snippets')
}
test {
outputs.dir "$projectDir/src/main/resources/public"
}
asciidoctor {
dependsOn test
inputs.dir snippetsDir
}
build {
dependsOn asciidoctor
}
ext['spring-restdocs.version'] = springRestDocsVersion
67

Spring REST Docs with WebTestClient (setup)
@CompileStatic
@Rule
JUnitRestDocumentation restDocumentation = new JUnitRestDocumentation()
@Autowired
void setup() {
.configureClient()
.filter(documentationConfiguration(restDocumentation))
.build()
}
}
68

Spring REST Docs with WebTestClient (tests)
void 'test and document creating a greeting with a custom name'() {
expect:
this.webTestClient.post().uri('/')
.contentType(MediaType.APPLICATION_JSON)
.accept(MediaType.APPLICATION_JSON)
.body(BodyInserters.fromObject('{"message": "Hello SpringOne Platform!"}'))
.exchange()
.expectBody()
.jsonPath('$.id').isNotEmpty()
.jsonPath('$.message').isEqualTo('Hello SpringOne Platform!')
.consumeWith(document('greetings-post-example',
preprocessRequest(prettyPrint()),
requestFields(
fieldWithPath('message').type(JsonFieldType.STRING)
.description("The greeting's message"))))
}`
69

Spring REST Docs with WebTestClient (tests)
void 'test and document get of a list of greetings'() {
expect:
this.webTestClient.get().uri('/').accept(MediaType.APPLICATION_JSON)
.exchange()
.expectBody()
.consumeWith(document('greetings-list-example',
preprocessResponse(prettyPrint()),
responseFields(greetingList)))
}
FieldDescriptor[] greetingList = new FieldDescriptor().with {
[fieldWithPath('[].id').type(JsonFieldType.STRING).optional()
.description("The greeting's id"),
fieldWithPath('[].message').type(JsonFieldType.STRING)
.description("The greeting's message")]
}
70

Error Messages
71

 
+@WebMvcTest(controllers = GreetingsController) 
+@AutoConfigureRestDocs( 
+ outputDir = "build/generated-snippets", 
+ uriHost = “api.example.com”, 
+ uriPort = 8080 
)
 
// @Rule 
// JUnitRestDocumentation restDocumentation = new JUnitRestDocumentation('src/docs/generated-snippets') 
 
+ @Autowired 
protected MockMvc mockMvc 
// 
// @Autowired 
// private WebApplicationContext context 
// 
// void setup() { 
// this.mockMvc = MockMvcBuilders.webAppContextSetup(this.context) 
// .apply(documentationConfiguration(this.restDocumentation)) 
// .build() 
// }
}
73

74

Generated Snippets
75
By Default When Speciﬁed
curl-request.adoc response-ﬁelds.adoc
http-request.adoc request-parameters.adoc
httpie-request.adoc request-parts.adoc
http-response.adoc path-parameters.adoc
request body request-parts.adoc
response body

http-request.adoc
[source,http,options="nowrap"]
----
POST /greetings/ HTTP/1.1
Content-Type: application/json
Accept: application/json
Host: localhost:8080
Content-Length: 45
{
"message" : "Hello SpringOne Platform!"
}
----
76

78

79
+

Adding The Snippets
[[overview-errors]]
== Errors
Whenever an error response (status code >= 400) is returned, the body will contain a JSON
object
that describes the problem. The error object has the following structure:
include::{snippets}/error-example/response-fields.adoc[]
For example, a request that attempts to delete on the greetings endpoint will produce a
`405 Method Not Allowed` response:
operation::error-example[snippets='curl-request,http-request,http-response']
[[resources]]
= Resources
include::resources/greetings.adoc[]
80

81

Building the docs
.
82
src/docs/
asciidoc
index.adoc
build/asciidoc/
html5
index.html
.gradlew asciidoctor

Publishing Strategies
• Hook in asciidoctor with the gradle build task
• Run the asciidoctor test separately (but make sure to run AFTER the tests)
• Send to static resources directory in the current app or send to a remote site (for
example Github Pages
X

85

85
http://api.example.com/docs

publish.gradle
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'org.ajoberstar:gradle-git:1.1.0'
}
}
apply plugin: 'org.ajoberstar.github-pages'
githubPages {
repoUri = 'git@github.com:jlstrater/groovy-spring-boot-restdocs-example.git'
pages {
from(file('build/asciidoc/html5'))
}
}
86

publish.gradle
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'org.ajoberstar:gradle-git:1.1.0'
}
}
apply plugin: 'org.ajoberstar.github-pages'
githubPages {
repoUri = 'git@github.com:jlstrater/groovy-spring-boot-restdocs-example.git'
pages {
from(file('build/asciidoc/html5'))
}
}
86
If you use this method,
remember to deploy docs at the
same time as the project!

87

87
http://jlstrater.github.io/groovy-
spring-boot-restdocs-example

87
http://jlstrater.github.io/groovy-
spring-boot-restdocs-example
./gradlew publish

Groovier Spring REST Docs
• Ratpack
• Grails
89

Groovier Spring REST Docs Example - Ratpack
• Ratpack Example Project
• https://github.com/ratpack/example-books
• Spring RESTdocs RestAssured
• https://github.com/ratpack/example-books/pull/25
92

path(":isbn") { 
def isbn = pathTokens["isbn"] 
 
byMethod { 
get { 
bookService.find(isbn). 
single(). 
subscribe { Book book -> 
if (book == null) { 
clientError 404 
} else { 
render book 
} 
} 
}
...
} 
}
93
byMethod { 
get { 
bookService.all(). 
toList(). 
subscribe { List<Book> books -> 
render json(books) 
} 
} 
post { 
parse(jsonNode()). 
observe(). 
flatMap { input -> 
bookService.insert( 
input.get("isbn").asText(), 
input.get("quantity").asLong(), 
input.get("price").asDouble() 
) 
}. 
single(). 
flatMap { 
bookService.find(it) 
}. 
single(). 
subscribe { Book createdBook -> 
render createdBook 
} 
}
}

path(":isbn") { 
 
byMethod { 
get { 
single(). 
clientError 404 
} else { 
render book 
} 
} 
}
...
} 
}
93
byMethod { 
get { 
toList(). 
} 
} 
post { 
observe(). 
) 
}. 
single(). 
flatMap { 
}. 
single(). 
} 
}
}
Get a book by ISBN
/api/books/1932394842

path(":isbn") { 
 
byMethod { 
get { 
single(). 
clientError 404 
} else { 
render book 
} 
} 
}
...
} 
}
93
byMethod { 
get { 
toList(). 
} 
} 
post { 
observe(). 
) 
}. 
single(). 
flatMap { 
}. 
single(). 
} 
}
}
Get a book by ISBN
/api/books/1932394842
Get all books
/api/books

path(":isbn") { 
 
byMethod { 
get { 
single(). 
clientError 404 
} else { 
render book 
} 
} 
}
...
} 
}
93
byMethod { 
get { 
toList(). 
} 
} 
post { 
observe(). 
) 
}. 
single(). 
flatMap { 
}. 
single(). 
} 
}
}
Get a book by ISBN
/api/books/1932394842
Get all books
/api/books
Post to create a new book
/api/books

94
https://github.com/jayway/rest-assured

abstract class BaseDocumentationSpec extends Specification { 
 
@Shared 
ApplicationUnderTest aut = new ExampleBooksApplicationUnderTest() 
 
@Rule 
JUnitRestDocumentation restDocumentation = new JUnitRestDocumentation() 
 
protected RequestSpecification documentationSpec 
 
void setup() { 
this.documentationSpec = new RequestSpecBuilder() 
.addFilter(documentationConfiguration(restDocumentation)) 
.build() 
} 
}
95

96

Blog Post
https://jennstrater.blogspot.com/2017/01/using-spring-rest-docs-to-document.html
98

Outcomes
• Made it to production! :)
• Team was happy with Spring REST Docs
• Other dev teams like to see the examples
X

Read the Docs for More On…
• Adding Security and Headers
• Documenting Constraints
• Hypermedia Support
• XML Support
• Using Markdown instead of Asciidoc
• Third Party Extensions for WireMock, Jersey, Spring Cloud Contracts, AutoRestDocs
100

102
Deﬁnitions
RAML
Testing
MockMVC
RestAssured
Documentation
AsciiDoc
Markdown
Wikis
Swagger UI
Swagger2Markup
Spring
REST
Docs
AssertJ-
Swagger
Contract-First

Conclusion
• API documentation is complex
• Choosing the right tool for the job not just about the easiest one to setup
• Spring REST Docs is a promising tool to enforce good testing and documentation
practices without muddying source code.
• I still hate writing boilerplate documentation, but at least it’s a little less painful now.
X

Next Steps
• Join the Groovy Community on Slack groovycommunity.com
• Join #spring-restdocs on gitter https://gitter.im/spring-projects/spring-restdocs
103

Learn More. Stay Connected.
Follow on Twitter @codeJENNerator
104
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Documenting RESTful APIs with Spring REST Docs

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