anchor.diff:  === Extensible
   
   `Reactivity` has a core concept but producing and consuming data can take different forms.
  -This is why `Reactivity` must be extensible by providing a pluggable API allowing extensions to register to the system.
  +This is why `Reactivity` must be extensible by providing a plugable API allowing extensions to register to the system.
   An extension can cover different capabilities.
   
   ==== Data synchronization
  
positive.code: * Streaming platform
  * Extensions
  
               ++++++++++++++++++++++++++++++               +++++++++++++++++++++++++++++++++                       
               +                            +      REST     +         Service discovery     +                       
               +                            +-------------->+-------------------------------+        REST           
               +                            +               +             ZooKeeper         +<-----+--------+------+
               +     Streaming Platform     +               +++++++++++++++++++++++++++++++++      |        |      |
               +                            +                                                      |        |      |
               +                            + KAFKA CLIENT ++++++++++++++++++++++++++++++++++      |        |      |
               +                            +<------------>+          Broadcaster           +------+        |      |
               +                            +              +--------------------------------+               |      |
               +----------------------------+              +          Spring Boot           +               |      |
               +           KAFKA            +              ++++++++++++++++++++++++++++++++++               |      |
               ++++++++++++++++++++++++++++++   REST            ^        + STATICS +  |                     |      |
                         ^            + API +<-------+          |        +++++++++++  |                     |      |
                         |            +++++++        |      SSE |            ^        |                     |      |
                         |                           |          |            |        |                     |      |
                         |                           |          |            |        |                     |      |
                         |                         ++++++++++++++++   HTTP   |        |  DB DRIVER          |      |
                         |                         +    WebApp    +----------+        +--------------+      |      |
                         |                         +--------------+                                  |      |      |
                         |                         +  JAVASCRIPT  +                                  |      |      |
                         |                         ++++++++++++++++                                  v      |      |
                         |                                                                         +++++++++++++   |
                         |                                                              DB DRIVER  + Database  +   |
                         |                                                            +----------->+-----------+   |
                         |                                                            |            + Couchbase +   |
                         |              +++++++++++++++++++++++++++++++++++++++++++++++++++++++++  +++++++++++++   |
                         | KAFKA CLIENT + Extensions -> Validation API -> Persistance Component +                  |
                         +------------->+ ------------------------------------------------------+                  |
                                        +                       Spring Boot                     +------------------+
                                        +++++++++++++++++++++++++++++++++++++++++++++++++++++++++                   
               
  === Service discovery
  
  
negative.code: Transformation can be also aggregations to satisfy some user views requirements.
  This means that a stream can be composed of different streams.
  
  There is no reason to exclude some system interactions from the asynchronous messaging model.
  Even a click from a user can be considered as a stream source.
  
  image:https://camo.githubusercontent.com/36c0a9ffd8ed22236bd6237d44a1d3eecbaec336/687474703a2f2f692e696d6775722e636f6d2f634c344d4f73532e706e67[https://github.com/staltz]
  