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"functionName": {
        "returns": "string",
        "parameters": [
            { "name": "startIndex", "type": "int" },
            { "name": "endIndex", "type": "int" },
            {
                "name": "theData",
                "type": {
                    "type": "dataset",
                    "includeColumnNames": true,
                    "columnTypes": { "icon": "media" }
                }
            }
        ],
        "blockEventProcessing": true,
		"async": true
}