'Retrieve imported issue specified by imported issue id.
:param int imported_issue_id: (required) id of imported issue
:returns: :class:`Imported Issue <github3.repos.
issue_import.ImportedIssue>`'

@requires_auth
def imported_issue(self, imported_issue_id):

    url = self._build_url(u'import/issues', imported_issue_id, base_url=self._api)
    data = self._get(url, headers=ImportedIssue.IMPORT_CUSTOM_HEADERS)
    json = self._json(data, 200)
    return self._instance_or_null(ImportedIssue, json)
