About a function of Pymc3 for Posterior prediction

Hello! I found a questions that I planned to get some predictions and I remembered that there have a function of pymc3 which named ‘sample_ppc’ .
However , When I Called the’ sample_ppc’ function, The system told me that " Model ‘pymc3’ has no attribute ‘sample_ppc’".
Can someone who is worm-hearted tell me what happend 。
Thanks for your reading!!!

It’s now called pm.sample_posterior_predictive


OK!I will try it again.Thanks.