anchor.diff:  `filter_add` - enable provided filters (on top of currently active filters).
   
   ... more TDB.
  -
  +--
   
   GET /rest/suggestions/query_string?q={user_query_string}
   < 200
  
positive.code: 
  
  --
  Suggestions
  --
  Get suggestions for user query.
  
  Returned JSON contains two parts:
  
  - `view`
  - `model`
  
  #### view
  
  The `view` represents the visual part of query suggestions.
  
  
negative.code: 
  It can then contain one or more additional sections (like `suggestions`, `filters`, `mails`, ... etc.). 
  
  #### Model
  
  The `model` represents possible "actions" that are relevant to individual `option`s in the `view` part.
  This means both `view` and `model` parts have the same highlevel structure and each `option`
  