def get_topics(self):
headers, data = self._requester.requestJsonAndCheck(<EOL>"<STR_LIT:GET>",<EOL>self.url + "<STR_LIT>",<EOL>headers={'<STR_LIT>': Consts.mediaTypeTopicsPreview}<EOL>)<EOL>return data['<STR_LIT>']<EOL>
:calls: `GET /repos/:owner/:repo/topics <https://developer.github.com/v3/repos/#list-all-topics-for-a-repository>`_
:rtype: list of strings