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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_firmware_image(self, image_id):
 """Get a firmware image with provided image_id. :param str image_id: The firmware ID for the image to retrieve (Required) :return: FirmwareImage """

        api = self._get_api(update_service.DefaultApi)
        return FirmwareImage(api.firmware_image_retrieve(image_id))