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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 option(self, key, value):
 """Adds an output option for the underlying data source. You can set the following option(s) for writing files: * ``timeZone``: sets the string that indicates a timezone to be used to format timestamps in the JSON/CSV datasources or partition values. If it isn't set, it uses the default value, session local timezone. """

        self._jwrite = self._jwrite.option(key, to_str(value))
        return self