anchor.diff:  
   A web application can override the default distributable session management behavior in 1 of 2 ways:
   
  -1. Reference a session-management profile by name
  -1. Provide deployment-specific session management configuration
  +. Reference a session-management profile by name
  +. Provide deployment-specific session management configuration
   
   === Referencing an existing session management profile
   
  
positive.code: }
  ----
  
  [[session_attribute_marshalling]]
  === Session attribute marshalling
  
  
negative.code: An externalizer is an implementation of the `org.wildfly.clustering.marshalling.Externalizer` interface, which dictates how a given class should be marshalled.
  An externalizer reads/writes the state of an object directly from/to an input/output stream, but also:
  
  . Allows an application to store an object in the session that does not implement `java.io.Serializable`
  . Eliminates the need to serialize the class descriptor of an object along with its state
  
  e.g.
  [source,java]
  