<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def unmarshall(self, cls):
 """Unmarshalls the config into a class. Make sure that the tags on the attributes of the class are properly set. """

        for k, v in self.all_settings().items():
            setattr(cls, k, v)

        return cls