anchor.diff:  
   ==== Metadata
   
  -Metadata is returned as an array of objects with the content described above.
  +Metadata is exposed in a tree-like fashion with sub-trees for the sub-resources mentioned previously.
   
   Example:
   
  -if `GET /metrics/base/fooVal` exposes:
  +If `GET /metrics/base/fooVal` exposes:
   
   [source]
   ----
  
positive.code: 
  [source]
  ----
  [
    {"fooVal": {
        "unit": "ms",
        "type": "gauge",
        "description": "The size of foo after each request",
        "displayName": "Size of foo",
        "tags": "app=webshop"
       }
    }
  ]
  ----
  
  If the endpoint exposes multiple values like this:
  
  [source]
  ----
  
negative.code: }
  ----
  
  then `OPTIONS /metrics/base` exposes:
  
  [source]
  ----
  {
    "fooVal": {
      "unit": "ms",
      "type": "gauge",
      "description": "The duration of foo after each request",
      "displayName": "Duration of foo",
      "tags": "app=webshop"
    },
    "barVal": {
      "unit": "mbytes",
      "type": "gauge",
      "tags": "component=backend,app=webshop"
    }
  }
  ----
  
  
  