[{"collection":"collection","count":5,"content":{"groupId":{"type":"int","max":5},"actionPerformed":{"type":"enum","values":["actionPerformed"]},"date":{"type":"date","startDate":"2023-01-01T00:00:00.000Z","endDate":"2023-10-03T00:00:00.000Z"}},"indexes":[{"name":"g_1_d_-1","key":{"groupId":1,"date":-1}},{"name":"d_-1_g_1","key":{"date":-1,"groupId":1}}]}]

db.collection.aggregate([{"$sort":{groupId:1,date:-1}},{"$group":{_id:"$groupId",doc:{"$first":"$$ROOT"}}}]).explain()