{
    "net class definitions": {
        "Default": {
            "description": "", 
            "diff pair width": 400000, 
            "via drill": 800000, 
            "track width": 350000, 
            "uvia drill": 300000, 
            "diff pair gap": 450000, 
            "clearance": 600000, 
            "uvia diameter": 800000, 
            "via diameter": 900000
        }, 
        "new_new_class": {
            "description": "", 
            "diff pair width": 150000, 
            "via drill": 455000, 
            "track width": 225000, 
            "uvia drill": 110000, 
            "diff pair gap": 255000, 
            "clearance": 220000, 
            "uvia diameter": 330000, 
            "via diameter": 880000
        }
    } 
}