[
    {
        "name": "Clashset foo",
        "tolerance": 0.01,
        "a": [
            { "file": "/home/dion/one.ifc" }
        ],
        "b": [
            {
                "file": "/home/dion/two.ifc",
                "selector": ".IfcProduct",
                "mode": "i"
            }
        ]
    }
]