anchor.diff:        "predicted_field": "ml.G3_prediction", <3>
         "metrics": {  
           "r_squared": {},
  -        "mse": {}
  +        "mse": {},
  +        "msle": {},
  +        "huber": {}
         }
       }
     }
  
positive.code:       "predicted_field": "ml.G3_prediction", <3>
        "metrics": {  
          "r_squared": {},
          "mse": {}
        }
      }
    }
  
negative.code:       "predicted_field": "ml.price_prediction", <4>
        "metrics": {  
          "r_squared": {},
          "mse": {},
          "msle": {"offset": 10},
          "huber": {"delta": 1.5}
        }
      }
    }
  