static void ExecuteFuelScript(string script)
{
var model = new TestModel("fuel");
// create a dictionary with name <--> object pairs
// the objects will be registered under the name in the fuel interpreter
var nativeItems = new Dictionary <string, object>();
nativeItems["model"] = model;
LispVariant result = Lisp.Eval(script, nativeItems: nativeItems);
Console.WriteLine("Script result={0}", result);
}