src/vs/editor/browser/viewParts/currentLineHighlight/currentLineHighlight.ts/CurrentLineMarginHighlightOverlay/_renderOne
class CurrentLineMarginHighlightOverlay:	protected _renderOne(ctx: RenderingContext): string {
		const className = 'current-line' + (this._shouldRenderInMargin() ? ' current-line-margin' : '') + (this._shouldRenderOther() ? ' current-line-margin-both' : '');
		return `<div class="${className}" style="width:${this._contentLeft}px; height:${this._lineHeight}px;"></div>`;
	}