def getThingsForType(self, thingTypeId, parameters = None):
        """
        Gets details for multiple things of a type
        It accepts thingTypeId (string) and parameters
        In case of failure it throws APIException
        """
        thingsUrl = ApiClient.thingsUrl % (self.host, thingTypeId)

        r = requests.get(thingsUrl, auth=self.credentials, params = parameters, verify=self.verify)
        status = r.status_code
        if status == 200:
            self.logger.debug("List of things was successfully retrieved")
            return r.json()
        elif status == 401:
            raise ibmiotf.APIException(401, "The authentication token is empty or invalid", None)
        elif status == 403:
            raise ibmiotf.APIException(403, "The authentication method is invalid or the api key used does not exist", None)
        elif status == 404:
            raise ibmiotf.APIException(404, "The thing type does not exist", None)
        elif status == 500:
            raise ibmiotf.APIException(500, "Unexpected error", None)
        else:
            raise ibmiotf.APIException(None, "Unexpected error", None)
Gets details for multiple things of a type
        It accepts thingTypeId (string) and parameters
        In case of failure it throws APIException