anchor.diff:  ====
   This strategy won't affect *-to-one associations or embedded collections.
   
  -Generally, you should not make use of this strategy 
  +Generally, you should not make use of this strategy
   unless embedding the association information proves to be too big for your document
   and you wish to separate them.
   ====
  
positive.code: For maximum portability between stores, use the most generic interface possible.
  ====
  
  [[ogm-mongodb-annotation-configuration]]
  ==== Annotation based configuration
  
  
negative.code: 
  [source, JSON]
  ----
  { "_id" : "song_sequence_name", "next_val" : 21 }
  ----
  ====
  
  