const TrackableEntityKey = "_trackableEntity"; /** * Decorator for classes, allows them and their properties to be tracked using a TrackedEntity * @param constructor */ export function trackable(constructor: any) { constructor.prototype[TrackableEntityKey] = true; } export const isTrackableEntity = (obj: any) => { return obj !== null && typeof obj === "object" && obj[TrackableEntityKey] === true; }