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docs: fix bug in code examples for downgrading a service #19371

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docs: fix bug in code examples for downgrading a service #19371

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13 changes: 11 additions & 2 deletions aio/content/guide/upgrade.md
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Expand Up @@ -778,16 +778,25 @@ delete them once the upgrade is over.
It's also recommended to export the `heroesServiceFactory` function so that Ahead-of-Time
compilation can pick it up.

<div class="alert is-helpful">

**Note:** The 'heroes' string inside the factory refers to the AngularJS `HeroesService`.
It is common in AngularJS apps to choose a service name for the token, for example "heroes",
and append the "Service" suffix to create the class name.

</div>

<code-example path="upgrade-module/src/app/ajs-to-a-providers/ajs-upgraded-providers.ts" title="ajs-upgraded-providers.ts">
</code-example>

You can then provide the service to Angular by adding it to the `@NgModule`:

<code-example path="upgrade-module/src/app/ajs-to-a-providers/app.module.ts" region="register" title="app.module.ts">
</code-example>

You can then inject it in Angular using its class as a type annotation:
Then use the service inside your component by injecting it in the component constructor using its class as a type annotation:

<code-example path="upgrade-module/src/app/ajs-to-a-providers/hero-detail.component.ts" title="hero-detail.component.ts">

</code-example>

<div class="alert is-helpful">
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