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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 _load_version(cls, unpickler, version):
 """ An function to load an object with a specific version of the class. Parameters pickler : file A GLUnpickler file handle. version : int A version number as maintained by the class writer. """

        obj = unpickler.load()
        return TransformerChain(obj._state["steps"])