Access to DOM API methods and properties?

While I was writing the message bellow, I resolved the issue. I'll just leave the information here, available to others.

The Document interface (from where XMLDocument inherit most of its own methods and properties) can already be freely used, but won't show in C3 code suggestion/completion list.

Greetings!

First, a bit of context:

• I'm developing my first Android App and am using an XML as the default database.
• Information need to persist between sessions. After some research, it seemed convenient to preserve the existing data tree structure by saving it as a XMLDocument using a key in LocalStorage.

So far I've managed to successfully fetch the XML file from the assets folder, parse it using DOMParser and save it to LocalStorage.

async function ParseAndSaveXML(runtime){
	
	let r, url, xml, parser;
	
	try {
		//Buscar o xml na pasta de assets.
		url = await runtime.assets.getProjectFileUrl("nutritional_table.xml");
		r = await fetch(url);
		xml = await r.text();

		//Transcrever o XML para DOM
		parser = new DOMParser();
		tabelaNutricional = parser.parseFromString(xml, "text/xml");
		
		console.log(tabelaNutricional.getElementById("water"));

		return;
		
	} catch(e) {
		console.error(e);
		return e;
	}
}