date_time = datetime.datetime
  attrib = {'name': 'Bazel Invocations', 'time': '0.0',
            'timestamp': date_time.isoformat(date_time.utcnow())}
  testsuites = ElemTree.Element('testsuites')
  testsuite = ElemTree.SubElement(testsuites, 'testsuite')
  for url, invocation_results in result_store_dict.items():
    invocation_id = url.rsplit('/')[-1]
    if verbose: