duplicates:

• SR-4405 Add @escaping to RecoverableError.attemptRecovery

Issue Description:

The RecoverableError protocol contains the following method:

func attemptRecovery(optionIndex recoveryOptionIndex: Int, resultHandler handler: (Bool) -> Void)

This is analogous to -attemptRecoveryFromError:optionIndex:delegate:didRecoverSelector:contextInfo: from the old NSErrorRecoveryAttempting protocol, and is meant to make it possible to recover from errors asynchronously.

Unfortunately, the method takes a non-escaping closure, which prevents this usage, making the method rather useless, since it no longer can do any job that couldn't already be handled by the synchronous attemptRecovery(optionIndex: ) method.