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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 debug_sphere_out(self, p: Union[Unit, Point2, Point3], r: Union[int, float], color=None):
 """ Draws a sphere at point p with radius r. Don't forget to add 'await self._client.send_debug'. """

        self._debug_spheres.append(
            debug_pb.DebugSphere(p=self.to_debug_point(p), r=r, color=self.to_debug_color(color))
        )