How to use the autogalaxy.util.cosmology_util.scaling_factor_between_redshifts_from function in autogalaxy

def traced_grids_of_planes_from_grid(self, grid, plane_index_limit=None):

        traced_grids = []
        traced_deflections = []

        for (plane_index, plane) in enumerate(self.planes):

            scaled_grid = grid.copy()

            if plane_index > 0:
                for previous_plane_index in range(plane_index):
                    scaling_factor = cosmology_util.scaling_factor_between_redshifts_from(
                        redshift_0=self.plane_redshifts[previous_plane_index],
                        redshift_1=plane.redshift,
                        redshift_final=self.plane_redshifts[-1],
                        cosmology=self.cosmology,
                    )

                    scaled_deflections = (
                        scaling_factor * traced_deflections[previous_plane_index]
                    )

                    # TODO : Setup as GridInterpolate

                    scaled_grid -= scaled_deflections

            traced_grids.append(scaled_grid)

def scaling_factor_between_planes(self, i, j):
        return cosmology_util.scaling_factor_between_redshifts_from(
            redshift_0=self.plane_redshifts[i],
            redshift_1=self.plane_redshifts[j],
            redshift_final=self.plane_redshifts[-1],
            cosmology=self.cosmology,
        )