def get_source_import(self):
        """
        :calls: `GET /repos/:owner/:repo/import <https://developer.github.com/v3/migration/source_imports/#get-import-progress>`_
        :rtype: :class:`github.SourceImport.SourceImport`
        """
        import_header = {"Accept": Consts.mediaTypeImportPreview}
        headers, data = self._requester.requestJsonAndCheck(
            "GET",
            self.url + "/import",
            headers=import_header,
        )
        if not data:
            return None
        else:
            return github.SourceImport.SourceImport(self._requester, headers, data, completed=True)
:calls: `GET /repos/:owner/:repo/import <https://developer.github.com/v3/migration/source_imports/#get-import-progress>`_
        :rtype: :class:`github.SourceImport.SourceImport`