Get a list of issue type Resources from the server.

        :rtype: List[IssueType]

def issue_types(self):
        """Get a list of issue type Resources from the server.

        :rtype: List[IssueType]

        """
        r_json = self._get_json('issuetype')
        issue_types = [IssueType(
            self._options, self._session, raw_type_json) for raw_type_json in r_json]
        return issue_types