anchor.diff:  
   The Spring Framework also takes advantage of https://kotlinlang.org/docs/reference/null-safety.html[Kotlin null-safety]
   to determine if a HTTP parameter is required without having to explicitly
  -define the `required` attribute.  That means `@RequestParam name: String?` is treated
  -as not required and, conversely,  `@RequestParam name: String` is treated as being required.
  +define the `required` attribute. That means `@RequestParam name: String?` is treated
  +as not required and, conversely, `@RequestParam name: String` is treated as being required.
   This feature is also supported on the Spring Messaging `@Header` annotation.
   
   In a similar fashion, Spring bean injection with `@Autowired`, `@Bean`, or `@Inject` uses
  
positive.code: 
  === WebFlux.fn
  
  Here is an example of Coroutines router definined via the {doc-root}/spring-framework/docs/{spring-version}/kdoc-api/spring-framework/org.springframework.web.reactive.function.server/co-router.html[coRouter { }] DSL and related handlers.
  
  [source,kotlin,indent=0]
  ----
  
negative.code: 	implementation("org.jetbrains.kotlinx:kotlinx-coroutines-reactor:${coroutinesVersion}")
  }
  ----
  
  Version `1.3.0` and above are supported.
  
  === How Reactive translates to Coroutines?
  
  