openapi-placement.yaml

      responses:
        '200':
          headers:
            X-Rate-Limit-Limit:
              $ref: "https://raw.githubusercontent.com/ioggstream/openapi-samples/master/openapi-v3/schema/components.yaml#/components/headers/X-Rate-Limit-Limit"
            X-Rate-Limit-Remaining:
              $ref: "#/components/headers/X-Rate-Limit-Remaining"

components:
  headers:
    X-Rate-Limit-Limit:
      $ref: "https://raw.githubusercontent.com/ioggstream/openapi-samples/master/openapi-v3/schema/components.yaml#/components/headers/X-Rate-Limit-Limit"