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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_query_argument( self, name: str, default: Union[None, str, _ArgDefaultMarker] = _ARG_DEFAULT, strip: bool = True, ) -> Optional[str]: """Returns the value of the argument with the given name from the request query string. If default is not provided, the argument is considered to be required, and we raise a `MissingArgumentError` if it is missing. If the argument appears in the url more than once, we return the last value. .. versionadded:: 3.2 """

        return self._get_argument(name, default, self.request.query_arguments, strip)