public function create($projectId, $historyId, $executionId, $stepId, Google_Service_ToolResults_PerfMetricsSummary $postBody, $optParams = array())
  {
    $params = array('projectId' => $projectId, 'historyId' => $historyId, 'executionId' => $executionId, 'stepId' => $stepId, 'postBody' => $postBody);
    $params = array_merge($params, $optParams);
    return $this->call('create', array($params), "Google_Service_ToolResults_PerfMetricsSummary");
  }