src/vs/editor/browser/widget/diffEditorWidget.ts/SideBySideViewZonesComputer/_createOriginalMarginDomNodeForModifiedForeignViewZoneInAddedRegion
class SideBySideViewZonesComputer:	protected _createOriginalMarginDomNodeForModifiedForeignViewZoneInAddedRegion(): HTMLDivElement | null {
		return null;
	}