src/generators/dom/index.js/DomGenerator/constructor
class DomGenerator:	constructor ( parsed, source, name, options ) {
		super( parsed, source, name, options );
		this.blocks = [];
		this.uses = new Set();

		this.readonly = new Set();

		// initial values for e.g. window.innerWidth, if there's a <:Window> meta tag
		this.builders = {
			metaBindings: new CodeBuilder()
		};
	}