restCall error handler

[awhitford]

This code looks invalid:

        // handle error
        if (json.error) {
          let ex = new Error(json.error.message);
          ex.code = json.error.code;
          ex.target = json.error.target;
          ex.details = json.error.details;
          throw ex;
        } else {
          return json;
        }

Specifically, code, target, and details are not properties of an Error object.

[svc-developer]

The intent here is to add additional information to the api consumer in case of an error. Are you experience any issue with this?
Thanks