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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 json_decode(s: str) -> Any: """ Decodes an object from JSON using our custom decoder. """

    try:
        return json.JSONDecoder(object_hook=json_class_decoder_hook).decode(s)
    except json.JSONDecodeError:
        log.warning("Failed to decode JSON (returning None): {!r}", s)
        return None