{   "routes": [
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                "source": "gather.pl"
            },
            "forwards": [
                {   "qname": "process.pl"
                }
            ],
            "changes": [
                {   "this": "that"
                }
            ]
        },{ "match": {
                "source": "logtail.pl"
            },
            "forwards": [
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                }
            ],
            "changes": [
                {   "x": "yy"
                }
            ]
        }
    ]
}