Setting widget title font size

[thindata]

Is there a way to set the font size of the widget title in the json file?

                                {
                                        "type": "gauge",
                                        "settings": {
                                                "title": "Test Widget",
                                                "value": "datasources[\"dweet\"][\"test\"]",
                                                "units": "",
                                                "min_value": 0,
                                                "max_value": 100
                                        }