src/vs/workbench/contrib/notebook/browser/view/renderers/webviewPreloads.ts/OutputContainer/createOutputElement
class OutputContainer:		public createOutputElement(outputId: string, outputOffset: number, left: number, cellId: string): OutputElement {
			this.element.innerText = '';
			this.element.style.maxHeight = '0px';
			this.element.style.top = `${outputOffset}px`;

			this._outputNode = new OutputElement(outputId, left, cellId);
			this.element.appendChild(this._outputNode.element);
			return this._outputNode;
		}