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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 _from_any(any_pb):
 """Convert an ``Any`` protobuf into the actual class. Uses the type URL to do the conversion. .. note:: This assumes that the type URL is already registered. :type any_pb: :class:`google.protobuf.any_pb2.Any` :param any_pb: An any object to be converted. :rtype: object :returns: The instance (of the correct type) stored in the any instance. """

    klass = _TYPE_URL_MAP[any_pb.type_url]
    return klass.FromString(any_pb.value)