src/vs/editor/browser/config/fontMeasurements.ts/FontMeasurementsImpl/serializeFontInfo
class FontMeasurementsImpl:	public serializeFontInfo(): ISerializedFontInfo[] {
		// Only save trusted font info (that has been measured in this running instance)
		return this._cache.getValues().filter(item => item.isTrusted);
	}