<odoo>
<template id="assets_backend" inherit_id="web.assets_backend">
<xpath expr=".">
<script src="/web_tree_resize_column/static/lib/resizableColumns/jQuery.resizableColumns.js"></script>
<script src="/web_tree_resize_column/static/src/js/backend.js"></script>
</xpath>
</template>
</odoo>