'Iterate over users being followed by ``username``.
.. versionadded:: 1.0.0
This replaces iter_following(\'sigmavirus24\').
:param str username: (required), login of the user to check
:param int number: (optional), number of people to return. Default: -1
returns all people you follow
:param str etag: (optional), ETag from a previous request to the same
endpoint
:returns: generator of :class:`~github3.users.ShortUser`\ s'

def followed_by(self, username, number=(-1), etag=None):

    url = self._build_url(u'users', username, u'following')
    return self._iter(int(number), url, users.ShortUser, etag=etag)
