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    "frame_type": "ack", "ack_delay": 169, "acked_ranges": [[418, 419]]}, { 
    "frame_type": "padding"}]}],
[10376315, 0, "recovery", "metrics_updated", {"bytes_in_flight": 55,"smoothed_rtt": 65238}],
[10376315, 0, "transport", "datagram_sent", { "byte_length": 55}],
[10406654, 0, "transport", "datagram_received", { "byte_length": 32}],
[10406654, 0, "transport", "packet_received", { "packet_type": "1RTT", "header": { "packet_size": 32, "packet_number": 420, "dcid": "76d864d2cd5d7504" }, "frames": [{ 
    "frame_type": "connection_close", "error_space": "application", "error_code": 0}]}],
[10406668, 0, "info", "message", { "message": "Server CB, Stream: 0, 0 bytes, fin=6\u000a"}],
[10406676, 0, "transport", "packet_sent", { "packet_type": "1RTT", "header": { "packet_size": 7, "packet_number": 171 }, "frames": [{ 
    "frame_type": "connection_close", "error_space": "transport", "error_code": 0}]}],
[10406676, 0, "transport", "datagram_sent", { "byte_length": 23}],
[10406706, 0, "info", "message", { "message": "Closed. Retrans= 0, spurious= 0, max sp gap = 0, max sp delay = 0, dg-coal: 1.005848"}]]}]}