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