src/vs/editor/browser/view/viewLayer.ts/ViewLayerRenderer/_renderUntouchedLines
class ViewLayerRenderer:	private _renderUntouchedLines(ctx: IRendererContext<T>, startIndex: number, endIndex: number, deltaTop: number[], deltaLN: number): void {
		const rendLineNumberStart = ctx.rendLineNumberStart;
		const lines = ctx.lines;

		for (let i = startIndex; i <= endIndex; i++) {
			const lineNumber = rendLineNumberStart + i;
			lines[i].layoutLine(lineNumber, deltaTop[lineNumber - deltaLN]);
		}
	}