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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 deserialize(cls, value, *args, **kwargs):
 """Deserialize a value just after importing it `cls.deserialize` should always return a value of type `cls.TYPE` or `None`. """


        if isinstance(value, cls.TYPE):
            return value
        elif is_null(value):
            return None
        else:
            return value