anchor.diff:      + id (required, UUID, `bb7aae7e-c560-4b3d-b235-71e4305952b8`) ... ID of the Message
   
   + Request
  -    + Headers
  -
  -            Accept: application/hal+json
  -
  -+ Response 200 (application/hal+json)
  +
  +    + Headers
  +
  +            Accept: application/hal+json
  +
  ++ Response 200 (application/hal+json)
  +
       + Headers
   
               Link: <https://helpful.io/api/messages/bb7aae7e-c560-4b3d-b235-71e4305952b8>;rel="self",<https://helpful.io/api/people/10ce24de-23f6-433f-9a71-255cffffa96f>;rel="author",<https://helpful.io/api/conversations/9aedccd5-0261-4158-bc1c-0e377b306f02>;rel="conversation"
  
positive.code:                             }
                          }
                      }
                  ]
              }
  
  # Group Conversations
  
negative.code: ## POST /api/messages
  
  + Request
  
      + Headers
  
              Accept: application/hal+json
              Content-Type: application/hal+json
  
      + Body
  
  