I have one scenario in my product related to address search over multiple geocoding services. My product is integrated with ArcGIS Server (on premises or arcgisonline). I am allowing user to enter address on the form and performing address search. I am using Locator for that. I need to use one primary geocoding service and other as a backup services. Let's say if I don't find address from primary geocoding service then I have to use other backup services from the list. The question is - can I perform synchronous address search using Locator? That way, in case primary service fails then I can send request to another service and loop it.