<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
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<USER_TASK:>
Description:
 def visibility(self, visibility):
 """ Sets the visibility of this DatasetPatchRequest. Dataset visibility. `OPEN` if the dataset can be seen by any member of data.world. `PRIVATE` if the dataset can be seen by its owner and authorized collaborators. :param visibility: The visibility of this DatasetPatchRequest. :type: str """

        allowed_values = ["OPEN", "PRIVATE"]
        if visibility not in allowed_values:
            raise ValueError(
                "Invalid value for `visibility` ({0}), must be one of {1}"
                .format(visibility, allowed_values)
            )

        self._visibility = visibility