|numeric|string|File> $input The task input * @param callable(float):bool $reportProgress Report the task progress. If this returns false, that means the task was cancelled and processing should be stopped. * @param bool $includeWatermark Whether to include the watermark in the output files or not * @psalm-return array|numeric|string> * @throws ProcessingException * @since 33.0.0 */ public function process(?string $userId, array $input, callable $reportProgress, bool $includeWatermark = true): array; }