extras/packetforge/parsegraph/nodes/icmp.json

{
    "type" : "node",
    "name" : "icmp",
    "layout" : [
        {
            "name" : "type",
            "size" : "8"
        },
        {
            "name" : "code",
            "size" : "8"
        },
        {
            "name" : "checksum",
            "size" : "16"
        }
    ]
}