execute method
Implementation
@override
Future<bool?> execute(String caller, String propertyOrFunction, List<dynamic> arguments) async
{
if (scope == null) return null;
var function = propertyOrFunction.toLowerCase().trim();
switch (function)
{
case "start": return await show(context, mode, type, oldest, newest, format);
}
return super.execute(caller, propertyOrFunction, arguments);
}