src/vs/workbench/contrib/notebook/browser/view/renderers/webviewPreloads.ts/OutputContainer/constructor
class OutputContainer:		constructor(
			private readonly outputId: string,
		) {
			this.element = document.createElement('div');
			this.element.classList.add('output_container');
			this.element.style.position = 'absolute';
			this.element.style.overflow = 'hidden';
		}