anchor.diff:  }
   --------------------------------------------------
   
  -<1> `bucket_paths` instructs this derivative aggregation to use the output of the `sales` aggregation for the derivative
  +<1> `buckets_path` instructs this derivative aggregation to use the output of the `sales` aggregation for the derivative
   
   And the following may be the response:
   
  
positive.code:                 },
                  "sales_deriv": {
                      "derivative": {
                          "buckets_paths": "sales" <1>
                      }
                  }
              }
  
negative.code:                 },
                  "sales_deriv": {
                      "derivative": {
                          "buckets_path": "sales"
                      }
                  },
                  "sales_2nd_deriv": {
                      "derivative": {
                          "buckets_path": "sales_deriv" <1>
                      }
                  }
              }
  