anchor.diff:  
   + Response 401 (application/json)
       + Attributes (Error)
  -        + i18n
  +        + i18n (string) - a unique token representing above error description message; can be used for internationalization in frontends
               A comprehensive list of possible errors:
               - `NEED_AUTHENTICATION` if no valid session token has been supplied or the user for whom the token has been created does not exist (anymore)
   
  
positive.code: 
  + Response 401 (application/json)
      + Attributes (Error)
          + i18n
              A comprehensive list of possible errors:
              - `NEED_AUTHENTICATION` if no valid session token has been supplied or the user for whom the token has been created does not exist (anymore)
  
  + Response 404 (application/json)
      + Attributes (Error)
          + i18n
              A comprehensive list of possible errors:
              - `CLUSTER_NOT_FOUND` if the requested instance does not exist in the database
  
  
negative.code: 
  + Response 401 (application/json)
      + Attributes (Error)
          + i18n (string) - a unique token representing above error description message; can be used for internationalization in frontends
              A comprehensive list of possible errors:
              - `NEED_AUTHENTICATION` if no valid session token has been supplied or the user for whom the token has been created does not exist (anymore)
  
  + Response 404 (application/json)
      + Attributes (Error)
          + i18n (string) - a unique token representing above error description message; can be used for internationalization in frontends
              A comprehensive list of possible errors:
              - `CLUSTER_NOT_FOUND` if the requested instance does not exist in the database
  
  