 class="pre">Union</span><span class="p"><span class="pre">[</span></span><a class="reference internal" href="padl.transforms.html#padl.transforms.Rollout" title="padl.transforms.Rollout"><span class="pre">padl.transforms.Rollout</span></a><span class="p"><span class="pre">,</span></span><span class="w"> </span><a class="reference internal" href="padl.transforms.html#padl.transforms.Parallel" title="padl.transforms.Parallel"><span class="pre">padl.transforms.Parallel</span></a><span class="p"><span class="p