anchor.diff:          <groupId>io.quarkus</groupId>
           <artifactId>quarkus-resteasy</artifactId>
       </dependency>
  -    <dependency>
  -        <groupId>io.quarkus</groupId>
  -        <artifactId>quarkus-arc</artifactId>
  -    </dependency>
  -----
  -
  -[NOTE]
  -.What's ArC?
  -====
  -ArC is a CDI-based dependency injection solution tailored for Quarkus architecture - see also link:cdi-reference.html[Contexts and Dependency Injection].
  -====
  +----
   
   === The JAX-RS resources
   
  
positive.code: </build>
  ----
  
  If we focus on the dependencies section, you can see 2 extensions allowing the development of REST applications:
  
  [source,xml]
  ----
  
negative.code: 
  == Using injection
  
  In order to use dependency injection, we can use ArC which is a CDI-based dependency injection solution tailored for Quarkus architecture - see also link:cdi-reference.html[Contexts and Dependency Injection].
  The `quarkus-arc`, dependecy of the `quarkus-resteasy`, is used for this purpose.
  
  Let's modify the application and add a companion bean.
  Create the `src/main/java/org/acme/quickstart/GreetingService.java` file with the following content:
  
  