Кто удерживает клиента и когда видны события закрытия

[
    {
        "sku": "CUP",
        "price": 500
    },
    {
        "sku": "LAMP",
        "price": 1200
    }
]

[
    {
        "event": "topologyOpening",
        "topology_id": "6ae3b1a77ec1255970047115"
    },
    {
        "event": "serverOpening",
        "topology_id": "6ae3b1a77ec1255970047115",
        "host": "127.0.0.1",
        "port": 27075
    },
    {
        "event": "serverClosed",
        "topology_id": "6ae3b1a77ec1255970047115",
        "host": "127.0.0.1",
        "port": 27075
    },
    {
        "event": "topologyClosed",
        "topology_id": "6ae3b1a77ec1255970047115"
    }
]

{
    "topologyOpening": {
        "class": "MongoDB\\Driver\\Monitoring\\TopologyOpeningEvent",
        "same": true,
        "final": true,
        "not_instantiable": true,
        "new_rejected": true,
        "readonly": true
    },
    "serverOpening": {
        "class": "MongoDB\\Driver\\Monitoring\\ServerOpeningEvent",
        "same": true,
        "final": true,
        "not_instantiable": true,
        "new_rejected": true,
        "readonly": true
    },
    "serverClosed": {
        "class": "MongoDB\\Driver\\Monitoring\\ServerClosedEvent",
        "same": true,
        "final": true,
        "not_instantiable": true,
        "new_rejected": true,
        "readonly": true
    },
    "topologyClosed": {
        "class": "MongoDB\\Driver\\Monitoring\\TopologyClosedEvent",
        "same": true,
        "final": true,
        "not_instantiable": true,
        "new_rejected": true,
        "readonly": true
    }
}