def add_to_starred(self, starred):
assert isinstance(starred, github.Repository.Repository), starred<EOL>headers, data = self._requester.requestJsonAndCheck(<EOL>"<STR_LIT>",<EOL>"<STR_LIT>" + starred._identity<EOL>)<EOL>
:calls: `PUT /user/starred/:owner/:repo <http://developer.github.com/v3/activity/starring>`_
:param starred: :class:`github.Repository.Repository`
:rtype: None