{
    entities: [
        {
            name: "contact",
            fields: [
                {
                    name: "float",
                    displayName: "Float",
                    type: "float",
                    help: function(m) { return m.float != null ? 'Double of what you typed: ' + 2 * m.float : undefined; }
                }
            ]
        }
    ]
}