{
    "conversion": {
        "_all": {
            "enabled": false
        },
        "_source": {
            "enabled": true
        },
        "properties": {
            "source": {
                "type":  "string",
                "analyzer": "ik_complex",
                "search_analyzer": "ik_complex"
            },
            "dest": {
                "type":  "string",
                "analyzer": "ik_complex",
                "search_analyzer": "ik_complex"
            }
        }
    }
}