Why consistency.py line 332 add a offset to every timestep？

[Hellcatzm]

On file consistency.py line 332 “_timesteps = [t + self.bins_max // ((steps - 1) * 2) for t in _timesteps]”, could you tell me where is this line from？Is the formula in paper “Elucidating the Design Space of Diffusion-Based Generative Models”？