human
Solve the following python programming problem given the following code:
def disable_warning(f) : 
    def decorator_factory(warning_class = UserWarning) : 
        @ wraps (f) 
        def decorator(* a, **kw) : 
            filters = warnings.filters [:] 
            warnings.simplefilter ('ignore', warning_class) 
            try : 
                return f (* a, ** kw) 
finally : 
                warnings.filters = filters 
return decorator 
return <MASK> 
    
    Given the code above, what is a proper replacement for <MASK>? Choose among: f
assistant
#Here is a proper replacement for <MASK>.
def decorator_factory(