anchor.diff:  ----
   {
     "status": "BEGIN",
  -  "id": "571",
  +  "id": "571:53195829",
     "ts_ms": 1486500577125,
     "event_count": null,
     "data_collections": null
  
positive.code: For every transaction `BEGIN` and `END`, {prodname} generates an event that contains the following fields:
  
  `status`:: `BEGIN` or `END`.
  `id`:: String representation of the unique transaction identifier.
  `ts_ms`:: The time of a transaction boundary event (`BEGIN` or `END` event) at the data source.
  If the data source does not provide {prodname} with the event time, then the field instead represents the time at which {prodname} processes the event.
  `event_count` (for `END` events):: Total number of events emmitted by the transaction.
  
negative.code: 
  {
    "status": "END",
    "id": "571:53195832",
    "ts_ms": 1486500577691,
    "event_count": 2,
    "data_collections": [
  