uts">Layouts : a tree structure</a></li><li><a href="widgets.html" title="widgets">Widgets and connections : a graph structure</a></li><li><a href="modif_parent.html" title="modif_parent">Self-modifying layouts</a></li><li>More to come...</li></ol></header><nav class="odoc-toc"><ul><li><a href="#installing-the-tutorials-(optional)">Installing the tutorials (optional)</a></li><li><a href="#how-to-execute-these-tutorials">How to execute these tutorials</a><ul><li><a href="#option-1:-interactive-ocaml-session"