def METHOD_NAME(self, object_name: str) -> int:
    """Get the size of an object, in bytes.
    Args:
        object_name (str): The name of the object.
    Returns:
        int: The object size, in bytes.
    Raises:
        FileNotFoundError: If the file was not found in the object store.
        ObjectStoreTransientError: If there was a transient connection issue with getting the object size.
    """
    raise NotImplementedError(f'{type(self).__name__}.get_object_size is not implemented')