cmis_web_proxy/views/cmis_web_proxy.xml
<?xml version="1.0" encoding="utf-8"?>
<odoo>
<template id="assets_backend" name="cmis web proxy assets" inherit_id="cmis_web.assets_backend">
<xpath expr="." position="inside">
<script type="text/javascript" src="/cmis_web_proxy/static/src/js/form_widget.js"/>
</xpath>
</template>
</odoo>