Overloaded __call() to transparently handle Exceptions in production
Most Exceptions are thrown from API timeouts - which are more difficult to find in testing. To prevent fatals in production, this transparently handles Exceptions in __call(), returning an empty array instead. Room for improvement - store the Exception information as a WP_Error in a protected var. - Determine what the expected response type is. For example, status updates don't expect an array response - an appropriate response should be returned for the request.