[ { "v" : 2, "key" : { "_id" : 1 }, "name" : "_id_", "ns" : "mongochat.chats" }, { "v" : 2, "key" : { "expireAt" : 1 }, "name" : "expireAt_1", "ns" : "mongochat.chats", "expireAfterSeconds" : 20 }, { "v" : 2, "key" : { "createdAt" : 1 }, "name" : "createdAt_1", "ns" : "mongochat.chats", "expireAfterSeconds" : 10 } ]
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