How to show a message if Form has no fields to render?

[naveen8801]

Schema

{
    "type": "object",
    "properties": {
        "name": {
            "type": "string",
            "title" : "Name"

        },
        "age": {
            "type": "string",
            "title" : "Age"
        }
    }
}

UI Schema

{
    "name": {
        "ui:widget": "hidden"
    },
    "age": {
        "ui:widget": "hidden"
    }
}