DetailsTemplateOverride

{
    "detailsItemInfos": [
        {
            "item": {
                "firstValue": {
                    "fields": [
                        {
                            "dateFormat": "DATE_FORMAT_UNSPECIFIED",
                            "fieldPath": "string"
                        }
                    ]
                },
                "predefinedItem": "PREDEFINED_ITEM_UNSPECIFIED",
                "secondValue": {
                    "fields": [
                        {
                            "dateFormat": "DATE_FORMAT_UNSPECIFIED",
                            "fieldPath": "string"
                        }
                    ]
                }
            }
        }
    ]
}