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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 get_one_optional(self, locator):
 """ Gets an optional component reference that matches specified locator. :param locator: the locator to find references by. :return: a matching component reference or null if nothing was found. """

        try:
            components = self.find(locator, False)
            return components[0] if len(components) > 0 else None
        except Exception as ex:
            return None