code: def get_source_import(self):
          
          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)
docs: :calls: `GET /repos/:owner/:repo/import <https://developer.github.com/v3/migration/source_imports/#get-import-progress>`_
          :rtype: :class:`github.SourceImport.SourceImport`