public function match(array $results, $relation)
    {
        $entities = $this->getEager();

        // TODO; optimize this operation
        $dictionary = $this->buildDictionary($entities);

        $keyName = $this->parentMap->getKeyName();

        $cache = $this->parentMapper->getEntityCache();

        $host = $this;

        // Once we have an array dictionary of child objects we can easily match the
        // children back to their parent using the dictionary and the keys on the
        // the parent models. Then we will return the hydrated models back out.
        return array_map(function ($result) use ($dictionary, $keyName, $cache, $relation, $host) {
            $key = $result[$keyName];

            if (isset($dictionary[$key])) {
                $collection = $host->relatedMap->newCollection($dictionary[$key]);

                $result[$relation] = $collection;

                // TODO Refactor this
                $cache->cacheLoadedRelationResult($key, $relation, $collection, $this);
            } else {
                $result[$relation] = $host->relatedMap->newCollection();
            }

            return $result;
        }, $results);
    }