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<span></span><span class="n">model_fit</span><span class="o">.</span><span class="n">get_grouped_posterior_predictives_summary</span><span class="p">(</span><span class="n">grouping_vars</span><span class="o">=</span><span class="p">[</span><span class="s1">&#39;block_label&#39;</span><span class="p">,</span> <span 