src/vs/editor/browser/widget/diffEditorWidget.ts/InlineViewZonesComputer/_produceOriginalFromDiff
class InlineViewZonesComputer:	protected _produceOriginalFromDiff(lineChange: ILineChange, lineChangeOriginalLength: number, lineChangeModifiedLength: number): IMyViewZone | null {
		const marginDomNode = document.createElement('div');
		marginDomNode.className = 'inline-added-margin-view-zone';

		return {
			afterLineNumber: Math.max(lineChange.originalStartLineNumber, lineChange.originalEndLineNumber),
			heightInLines: lineChangeModifiedLength,
			domNode: document.createElement('div'),
			marginDomNode: marginDomNode
		};
	}