src/vs/base/browser/fastDomNode.ts/FastDomNode/setLineHeight
class FastDomNode:	public setLineHeight(_lineHeight: number | string): void {
		const lineHeight = numberAsPixels(_lineHeight);
		if (this._lineHeight === lineHeight) {
			return;
		}
		this._lineHeight = lineHeight;
		this.domNode.style.lineHeight = this._lineHeight;
	}