SOLR如何从SolrResponse获取SolrInputDocument以更新文档？

Question

当我尝试这段代码时，我有一个日志说

Call to undefined method SolrQueryResponse::getInputDocument() in...

$solrQueryResponse->setParseMode(\SolrQueryResponse::PARSE_SOLR_DOC);
$res = $solrQueryResponse->getResponse();
$doc = $res->response->docs[0]->getInputDocument();