human
Solve the following python programming problem given the following code:
def __call__(self, f, prewrapper_func = None) : 
    '
        This method is called on execution of the decorator to get the wrapper
        defined inside. The C{prewrapper_func} keyword argument is available for
        subclasses. If defined, the output of the prewrapper function is
        returned instead of the wrapper function. The prewrapper function 
        should have one argument: C{wrapper} which is the original function
        that would have been returned.
        ' 
    def require_obj_permissions_wrapper(obj, * args, **kw) : 
        '
            Wrapper for the called method that checks the permissions before
            calling the method.
            ' 
        try : 
            if self.pop_user_kw : 
                user = kw.pop (self.user_kw) 
else : 
                user = kw [self.user_kw] 
except KeyError : 
            raise PermissionSignatureError (self.user_kw) 
(missing, temp) = ExpedientPermission.objects.get_missing_for_target (user, self.perm_names, obj) 
        if missing : 
            raise PermissionDenied (missing.name, obj, user) 
return f (obj, * args, ** kw) 
if prewrapper_func : 
        return prewrapper_func (<MASK>) 
else : 
        return require_obj_permissions_wrapper 
    
    Given the code above, what is a proper replacement for <MASK>? Choose among: require_obj_permissions_wrapper, self, prewrapper_func, f
assistant
#Here is a proper replacement for <MASK>.
require_obj_permissions_wrapper