ElasticSearch ShingleFilter arg reversal

gistfile1.txt

curl -XPOST 'http://localhost:9200/test/?pretty=1' -d '{
        "settings": {
                "analysis":{
                        "analyzer": {
                                "my_analyzer": {
                                        "type": "custom",
                                        "filter": ["my_shingle_filter"],
                                        "tokenizer": "standard"
                                }
                        },
                        "filter": {
                                "my_shingle_filter": {
                                        "type": "shingle",
                                        "min_shingle_size": 2,
                                        "max_shingle_size": 4
                                }
                        }
                }
        }
}'

curl -XPUT 'http://localhost:9200/test/type/_mapping?pretty=1' -d '{
    "type" : {
        "properties" : {
            "content": {
                "type":"multi_field",
                    "fields":{
                        "raw_field" : {"type" : "string"},
                        "custom_field" : {"type" : "string", "analyzer":"my_analyzer"}
                    }
            }
        }
    }
}'

curl -XPOST 'http://localhost:9200/test/type/example?pretty=1' -d '{
        "content": "this is a test"
}'