def versionadded(reason="", version=""):
    """
    This decorator can be used to insert a "versionadded" directive
    in your function/class docstring in order to documents the
    version of the project which adds this new functionality in your library.

    :param str reason:
        Reason message which documents the addition in your library (can be omitted).

    :param str version:
        Version of your project which adds this feature.
        If you follow the `Semantic Versioning <https://semver.org/>`_,
        the version number has the format "MAJOR.MINOR.PATCH", and,
        in the case of a new functionality, the "PATCH" component should be "0".

    :return: the decorated function.
    """
    adapter = SphinxAdapter('versionadded', reason=reason, version=version)

    # noinspection PyUnusedLocal
    @wrapt.decorator(adapter=adapter)
    def wrapper(wrapped, instance, args, kwargs):
        return wrapped(*args, **kwargs)

    return wrapper