anchor.diff:  ATTRIBUTE:::
   Stores each session attribute within a separate cache entry.
   This is generally more efficient than SESSION granularity, but does not preserve any cross-attribute object references.
  -
   affinity::
   This resource defines the affinity that a web request should have for a given server.
   The affinity of the associated web session determines the algorithm for generating the route to be appended onto the session ID (within the JSESSIONID cookie, or when encoding URLs).
  
positive.code: Externalizers are dynamically loaded during deployment via the service loader mechanism.
  Implementations should be enumerated within a file named:
  `/META-INF/services/org.wildfly.clustering.marshalling.Externalizer`
  
negative.code: === Session attribute marshalling
  
  Minimizing the replication/persistence payload for individual session attributes has a direct impact on performance by reducing the number of bytes sent over the network or persisted to storage.
  
  ==== JBoss Marshalling
  
  https://jbossmarshalling.jboss.org/[JBoss Marshalling] is a serialization library for objects implementing `java.io.Serializable`.
  
  When configured to use JBoss Marshalling, a web application can optimize the marshalling of a given session attribute, either through custom JDK serialization logic, or by implementing a custom externalizer.
  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:
  
  