anchor.diff:  ----
   POST _ingest/pipeline/_simulate
   {
  -  "pipeline" : {
  +  "pipeline": {
       "processors": [
         {
           "lowercase": {
  
positive.code: 
  PUT my-data-stream/_bulk?pipeline=my-pipeline
  { "create":{ } }
  { "@timestamp": "2099-03-08T11:04:05.000Z", "my-keyword-field" : "foo" }
  { "create":{ } }
  { "@timestamp": "2099-03-08T11:06:07.000Z", "my-keyword-field" : "bar" }
  ----
  
  You can also use the `pipeline` parameter with the <<docs-update-by-query,update
  
negative.code: ----
  PUT _ingest/pipeline/my-pipeline-id
  {
    "version": 1,
    "processors": [ ... ]
  }
  ----
  