pace:nowrap">?arr:<a class="type" title="Array" href="../Array.html">Array</a>&lt;<span class="type">T</span>&gt;</span>):<a class="type" title="Array" href="../Array.html">Array</a>&lt;<span class="type">T</span>&gt;</code></h3><div class="doc"><p>Find several objects in the tree by calling <code>f</code> on each and returning all the not-null values returned.</p><p class="javadoc">Parameters:</p><table class="table table-bordered params"><tr><th style="width:25%;"><code>arr</code></th><td><p>An optional a