| @@ -24,12 +24,12 @@ | ||
| 24 | 24 | { |
| 25 | 25 | /** |
| 26 | 26 | * Fetches the auth tokens based on the current state. |
| 27 | 27 | * |
| 28 | - * @param callable|null $httpHandler callback which delivers psr7 request | |
| 28 | + * @param callable $httpHandler callback which delivers psr7 request | |
| 29 | 29 | * @return array<mixed> a hash of auth tokens |
| 30 | 30 | */ |
| 31 | - public function fetchAuthToken(?callable $httpHandler = null); | |
| 31 | + public function fetchAuthToken(callable $httpHandler = null); | |
| 32 | 32 | |
| 33 | 33 | /** |
| 34 | 34 | * Obtains a key that can used to cache the results of #fetchAuthToken. |
| 35 | 35 | * |
