{
    "foo": [
        {
            "conditions": [
                {
                    "stack": "bar",
                    "pattern": [
                        {
                            "type": "variable",
                            "symbol": "baz"
                        },
                        {
                            "type": "literal",
                            "symbol": "quux"
                        }
                    ]
                }
            ],
            "results": [
                {
                    "label": "another rule group",
                    "pattern": [
                        {
                            "stack": "foo",
                            "pattern": [
                                {
                                    "type": "variable",
                                    "symbol": "foo"
                                },
                                {
                                    "type": "literal",
                                    "symbol": "bar"
                                }
                            ]
                        }
                    ]
                }
            ]
        }
    ]
}