human
Solve the following python programming problem given the following code:
def indexable(fields) : 
    '
        Args:
            fields (list<tuple<str, type>>): a list of tuples of the form (attribute_name, attribute_type) to perform the lookup on in the objects in the list or dict
    ' 
    @ cassiopeia.type.core.common.inheritdocs 
    def _wrapper(func) : 
        def wrapper(* args, **kwargs) : 
            result = func (* args, ** kwargs) 
            if isinstance (result, list) : 
                result = LookupableList (fields, result) 
if isinstance (result, dict) : 
                result = LookupableDict (fields, result) 
return result 
return wrapper 
return fields 

    
    

    Fix the buggy line: return fields
assistant
#Here is Python code to fix the buggy line: return fields
.

return def _wrapper(