anchor.diff:    /collections:
       get:
         responses:
  +        '302':
  +          description: "302 redirect"
  +          headers:
  +            Location:
  +              schema:
  +                type: "string"
           '200':
             content:
               application/json:
  
positive.code:                 $ref: '#/components/schemas/metrics'
          description: The URL to the smartAPI descriptor of the Metric
        responses:
          '200':
            content:
              application/json:
  
negative.code:                 $ref: '#/components/schemas/collections'
          description: register a new collection of FAIR Metrics
        responses:
          '302':
            description: "302 redirect"
            headers:
              Location:
                schema:
                  type: "string"
          '200':
            content:
              application/json:
  