{"allUsers":[],"client":"127.0.0.1","cursorExhausted":false,"docsExamined":{"$numberInt":"2"},"nscannedObjects":{"$numberInt":"0"},"execStats":{"advanced":{"$numberInt":"1"},"executionTimeMillisEstimate":{"$numberInt":"41"},"inputStage":{"advanced":{"$numberInt":"2"},"direction":"","docsExamined":{"$numberInt":"2"},"executionTimeMillisEstimate":{"$numberInt":"0"},"filter":{"date":{"$eq":""}},"invalidates":{"$numberInt":"0"},"isEOF":{"$numberInt":"1"},"nReturned":{"$numberInt":"2"},"needTime":{"$numberInt":"0"},"needYield":{"$numberInt":"0"},"restoreState":{"$numberInt":"1"},"saveState":{"$numberInt":"1"},"stage":"FETCH","works":{"$numberInt":"3"}},"invalidates":{"$numberInt":"0"},"isEOF":{"$numberInt":"1"},"limitAmount":{"$numberInt":"0"},"nReturned":{"$numberInt":"1"},"needTime":{"$numberInt":"3"},"needYield":{"$numberInt":"0"},"restoreState":{"$numberInt":"1"},"saveState":{"$numberInt":"1"},"stage":"GROUP","works":{"$numberInt":"4"}},"keyUpdates":{"$numberInt":"0"},"keysExamined":{"$numberInt":"2"},"locks":{"Collection":{"acquireCount":{"R":{"$numberInt":"3"}}},"Database":{"acquireCount":{"r":{"$numberInt":"3"}}},"Global":{"acquireCount":{"r":{"$numberInt":"6"}}},"MMAPV1Journal":{"acquireCount":{"r":{"$numberInt":"0"}}}},"millis":{"$numberInt":"42"},"nreturned":{"$numberInt":"0"},"ns":"test.coll","numYield":{"$numberInt":"1"},"op":"command","protocol":"op_msg","query":null,"updateobj":null,"command":{"group":{"key":{"a":{"$numberInt":"1"},"b":{"$numberInt":"1"}},"cond":{"b":{"$numberInt":"3"}},"initial":{},"ns":"coll","$reduce":{"code":"function () {}"}},"$db":"test"},"originatingCommand":null,"responseLength":{"$numberInt":"124"},"ts":{"$date":{"$numberLong":"1577836800000"}},"user":"","writeConflicts":{"$numberInt":"0"}}