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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 full_restapi_key_transformer(key, attr_desc, value):
 """A key transformer that returns the full RestAPI key path. :param str _: The attribute name :param dict attr_desc: The attribute metadata :param object value: The value :returns: A list of keys using RestAPI syntax. """

    keys = _FLATTEN.split(attr_desc['key'])
    return ([_decode_attribute_map_key(k) for k in keys], value)