src/vs/base/browser/fastDomNode.ts/FastDomNode/setFontVariationSettings
class FastDomNode:	public setFontVariationSettings(fontVariationSettings: string): void {
		if (this._fontVariationSettings === fontVariationSettings) {
			return;
		}
		this._fontVariationSettings = fontVariationSettings;
		this.domNode.style.fontVariationSettings = this._fontVariationSettings;
	}