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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 contains(self, points):
 """ Given a set of points, determine whether or not they are inside the mesh. This raises an error if called on a non- watertight mesh. Parameters --------- points : (n, 3) float Points in cartesian space Returns --------- contains : (n, ) bool Whether or not each point is inside the mesh """

        if not self.is_watertight:
            log.warning('Mesh is non- watertight for contained point query!')
        contains = self.ray.contains_points(points)
        return contains