human
Solve the following python programming problem given the following code:
@ classmethod 
def loads(cls, data) : 
    def object_hook(d) : 
        if (d.get ('type') == 'SerializedFunction') : 
            return cls.loads (d ['dump']) 
else : 
            return d 
try : 
        functions = json.loads (data, object_hook = object_hook) 
except Exception : 
        return cls (to_function (cls)) 
self = cls () 
    for o in functions : 
        (f, kwargs) = (o ['function'], o ['kwargs']) 
        f = to_function (f) 
        self.add (f, ** kwargs) 
return self 

    
    

    Fix the buggy line: return cls (to_function (cls))
assistant
#Here is Python program to fix the buggy line: return cls (to_function (cls))
.

return cls (to_function (data))