extractDeleteCommands example

            $this->validateSyncOperationInput($operation);

            $definition = $this->registry->getByEntityName($operation->getEntity());

            $this->validateWriteInput($operation->getPayload());

            if ($operation->getAction() === SyncOperation::ACTION_DELETE) {
                $deletes[] = $this->factory->resolveDelete($definition, $operation->getPayload());

                $notFound[] = $this->extractDeleteCommands($definition, $operation->getPayload(), $context, $commandQueue);

                continue;
            }

            if ($operation->getAction() === SyncOperation::ACTION_UPSERT) {
                $parameters = new WriteParameterBag($definition, $context, '', $commandQueue);

                $payload = $this->commandExtractor->normalize($definition, $operation->getPayload(), $parameters);
                $this->gateway->prefetchExistences($parameters);

                $key = $operation->getKey();