requests.test42 = {
    "requests" : [{
            "getData" : {
                "source" : "DsRestAPI_Test_DataSource",
                "element" : "EntityGroups",
                "params" : [],
                "children" : [],
                "filter": {
                    "request" : {
                        "source" : "DsRestAPI_Test_DataSource"
                    }
                }
            }
        }
    ]
}

descriptions.test42 = "Filter syntax error, request not complete"