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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 register(cls, origin_type):
 """Decorator for mutation tracker registration. The provided `origin_type` is mapped to the decorated class such that future calls to `convert()` will convert the object of `origin_type` to an instance of the decorated class. """

        def decorator(tracked_type):
            """Adds the decorated class to the `_type_mapping` dictionary."""
            cls._type_mapping[origin_type] = tracked_type
            return tracked_type
        return decorator