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<h4 id="back_annotate" class="doc_header"><code>back_annotate</code><a href="https://github.com/Noeloikeau/fpyga/tree/master/fpyga/scripting.py#L541" class="source_link" style="float:right">[source]</a></h4><blockquote><p><code>back_annotate</code>(<strong><code>projectname</code></strong>, <strong><code>routing</code></strong