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