def get_package_url(cls, package, session=None, silent=False):
        response = get("{}/packages/{}".format(cls.bower_base_uri, package))
        return response.json().get("url", None)
def deserialize(self, value):
        value = decode(value)
        validators.validate_choice(value.lower(), self.levels.keys())
        return self.levels.get(value.lower())