title: Grouping of API methods in documentation - is there some custom attribute
body: <p>I have controller like</p>
  
  <pre><code>public class UserController : ApiController
  {
    [Route("api/user")]
    IHttpActionResult GetUser() { ... }
  }
  
  public class ResumeController : ApiController
  {
    [Route("api/user/resumes")]
    IHttpActionResult GetResumes() { ... }
  }
  </code></pre>
  
  <p>Which on swagger generates output like
  <a href="https://i.stack.imgur.com/7djAr.png" rel="noreferrer"><img src="https://i.stack.imgur.com/7djAr.png" alt="enter image description here"></a></p>
  
  <p>Is there a way (besides overriding default implementation by rolling out your own <code>ISwaggerProvider</code> or merging two controllers into one) to enforce the group name ? Something like</p>
  
  <pre><code>public class UserController : ApiController
  {
    [Route("api/user")]
    [MagicalAttributeName(Group="User")]
    IHttpActionResult GetUser() { ... }
  }
  
  public class ResumeController : ApiController
  {
    [Route("api/user/resumes")]
    [MagicalAttributeName(Group="User")]
    IHttpActionResult GetResumes() { ... }
  }
  </code></pre>