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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 offering(self):
 """ Deprecated. Use course and run independently. """

        warnings.warn(
            "Offering is no longer a supported property of Locator. Please use the course and run properties.",
            DeprecationWarning,
            stacklevel=2
        )
        if not self.course and not self.run:
            return None
        elif not self.run and self.course:
            return self.course
        return "/".join([self.course, self.run])