fix the following java mongodb-driver-reactivestreams codeAggregatesgroupnew Documenttimestamp $timestampappendurl $url firstbreadcrumbObjectdatatoaspath Aggregatesgr
Aggregates.group(new Document("_id", new Document("timestamp", "$timestamp").append("url", "$url"))) .first("breadcrumbObject.data.to").as("path"),
Aggregates.group(new Document())
.count().as("pathNum")
.sum("callNum").as("totalCallNum"),
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