mbed-os/features/frameworks/mbed-trace/mbed_lib.json

{
    "name": "mbed-trace",
    "config": {
        "enable": {
            "help": "Used to globally enable traces.",
            "value": null
        },
        "fea-ipv6": {
            "help": "Used to globally disable ipv6 tracing features.",
            "value": null
        }

    }    
}