SalesChannelProcessCriteriaEvent example

$definition = $cur['definition'];
            $criteria = $cur['criteria'];

            if (isset($processed[$definition::class])) {
                continue;
            }

            if ($definition instanceof SalesChannelDefinitionInterface) {
                $definition->processCriteria($criteria, $salesChannelContext);

                $eventName = \sprintf('sales_channel.%s.process.criteria', $definition->getEntityName());
                $event = new SalesChannelProcessCriteriaEvent($criteria, $salesChannelContext);

                $this->eventDispatcher->dispatch($event, $eventName);
            }

            $processed[$definition::class] = true;

            foreach ($criteria->getAssociations() as $associationName => $associationCriteria) {
                // find definition                 $field = $definition->getField($associationName);
                if (!$field instanceof AssociationField) {
                    continue;
                }