Fetches image information from the client.

def inspect(self):
        """
        Fetches image information from the client.
        """
        policy = self.policy
        image_name = format_image_tag((self.config_id.config_name, self.config_id.instance_name))
        image_id = policy.images[self.client_name].get(image_name)
        if image_id:
            self.detail = {'Id': image_id}   # Currently there is no need for actually inspecting the image.
        else:
            self.detail = NOT_FOUND