collectByEntity example

        if ($products->isStatic() && $products->getValue()) {
            $criteria = new Criteria($products->getArrayValue());
            $criteria->addAssociation('cover');
            $criteria->addAssociation('options.group');
            $criteria->addAssociation('manufacturer');
            $collection->add(self::STATIC_SEARCH_KEY . '_' . $slot->getUniqueIdentifier(), ProductDefinition::class, $criteria);
        }

        if ($products->isMapped() && $products->getValue() && $resolverContext instanceof EntityResolverContext) {
            $criteria = $this->collectByEntity($resolverContext, $products);
            if ($criteria !== null) {
                $collection->add(self::PRODUCT_SLIDER_ENTITY_FALLBACK . '_' . $slot->getUniqueIdentifier(), ProductDefinition::class, $criteria);
            }
        }

        if ($products->isProductStream() && $products->getValue()) {
            $criteria = $this->collectByProductStream($resolverContext, $products, $config);
            $collection->add(self::PRODUCT_SLIDER_ENTITY_FALLBACK . '_' . $slot->getUniqueIdentifier(), ProductDefinition::class, $criteria);
        }

        return $collection->all() ? $collection : null;
    }