# tunnel path exists
[
    {
        "match": {
            "left": {
                "tunnel": {
                    "key": "path"
                }
            },
            "op": "==",
            "right": true
        }
    }
]

# tunnel path missing
[
    {
        "match": {
            "left": {
                "tunnel": {
                    "key": "path"
                }
            },
            "op": "==",
            "right": false
        }
    }
]

# tunnel id 10
[
    {
        "match": {
            "left": {
                "tunnel": {
                    "key": "id"
                }
            },
            "op": "==",
            "right": 10
        }
    }
]