description: Query Height histogram with value from context
events:
  - - supergraph_request:
        uri: "/hello"
        method: GET
        headers:
          count_header: "10"
        query: "query { hello }"
    - extension:
        map:
          "apollo_private.query.height": 3
    - supergraph_response:
        status: 200
        data:
          hello: "world"
