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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def current_state(self):
        '''
        Return the current internal state of the model instance.

        This is not necessarily the same as the persisted state
        stored in the self.base_state variable.
        '''
        c_state = getattr(self, '_current_state_hydrated', None)
        if not c_state:
            c_state = json.loads(self.base_state)
            setattr(self, '_current_state_hydrated', c_state)
            setattr(self, '_current_state_hydrated_changed', False)
        return c_state