src/vs/workbench/contrib/notebook/browser/view/cellParts/cellOutput.ts/CellOutputElement/_generateInnerOutputContainer
class CellOutputElement:	private _generateInnerOutputContainer(previousSibling: HTMLElement | undefined, pickedMimeTypeRenderer: IOrderedMimeType) {
		this.innerContainer = DOM.$('.output-inner-container');

		if (previousSibling && previousSibling.nextElementSibling) {
			this.outputContainer.domNode.insertBefore(this.innerContainer, previousSibling.nextElementSibling);
		} else {
			this.outputContainer.domNode.appendChild(this.innerContainer);
		}

		this.innerContainer.setAttribute('output-mime-type', pickedMimeTypeRenderer.mimeType);
		return this.innerContainer;
	}