code: public static void isSubscribed (Activity context, Entity e, SubscriptionType type, SubscriptionCheckListener listener) {
  		subscriptionUtils.isSubscribed(context, e, type, listener);
  	}
docs: Determines if the current user is subscribed to notifications on new comments for the given entity.
  @param context The current context.
  @param e The entity.
  @param type The subscription type.
  @param listener A listener to handle the result.