How to implement "didAutocompleteWith" property in swift

[niranjanbprajapati]

I have tried to implement the autocompleteview in my swift project by using bridge headers. But i am not able to figure out how to implement the _autocompleteView.didAutocompleteWith property as in objective c the above property uses
_autocompleteView.didAutocompleteWith = ^(id item)
{
NSLog(@"Autocompleted with: %@", item.completionText);
};

not able to figure out how to implement above property in swift.