datastore: Filter seems not to work on Strings about google-cloud-node HOT 5 CLOSED

{
    "readOptions": {
        "transaction": null
    },
    "query": {
        "projection": [],
        "kinds": [{
            "name": "Company"
        }],
        "filter": {
            "compositeFilter": {
                "filters": [{
                    "propertyFilter": {
                        "property": {
                            "name": "name"
                        },
                        "operator": "EQUAL",
                        "value": {
                            "properties": {
                                "stringValue": "Google"
                            }
                        }
                    }
                }],
                "operator": "AND"
            }
        },
        "order": [],
        "groupBy": []
    }
}