overtrue / cuttle

                throw new InvalidArgumentException(sprintf('Formatter %s not configured.', $option['formatter']));

            }

            foreach ($option['processors'] ?? [] as $processorId) {

                if (!isset($this->processors[$processorId])) {

                    throw new InvalidArgumentException(sprintf('Processor %s not configured.', $processorId));

                }

            }

            $class = $option['handler'] ?? StreamHandler::class;

            unset($option['handler']);

    protected function formatChannels(array $channels = [])

    {

        foreach ($channels as $id => $option) {

            foreach ($option['processors'] ?? [] as $processorId) {

                if (!isset($this->processors[$processorId])) {

                    throw new InvalidArgumentException(sprintf('Processor %s not configured.', $processorId));

                }

            }

            foreach ($option['handlers'] ?? [] as $handlerId) {

                if (!isset($this->handlers[$handlerId])) {

                }

            }

            foreach ($option['handlers'] ?? [] as $handlerId) {

                if (!isset($this->handlers[$handlerId])) {

                    throw new InvalidArgumentException(sprintf('Handler %s not configured.', $handlerId));

                }

            }

            $channels[$id] = array_merge(['handlers' => [], 'processors' => []], $option);

        }