execute method
Implementation
Future<bool?> execute(String caller, String propertyOrFunction, List<dynamic> arguments) async
{
if (scope == null) return null;
var function = propertyOrFunction.toLowerCase().trim();
switch (function)
{
case 'complete':
return complete();
case 'save':
return (await save() != null);
case 'validate':
return (await validate() == null);
case 'clear':
return clear();
}
return super.execute(caller, propertyOrFunction, arguments);
}