One attempt a call made to its provider, as ModelCompletionOptions.onAttempt reports it.
The attempt's number in the call, from 1.
The HTTP status its last send answered (after any key hops inside it), or null when none came (a timeout, a network failure).
True when it answered with a success.
One attempt a call made to its provider, as ModelCompletionOptions.onAttempt reports it.