Storm\Drivers\Base\Relational\Relations\ToManyRelationBase::MapParentRowKeysToGroupedRelatedRows PHP Метод

    protected final function MapParentRowKeysToGroupedRelatedRows(array &$MappedRelatedRows, array $ParentRows, array $MapByColumns, array $GroupedRelatedRows)
    {
        $ParentDataHashKeyMap = $this->MakeHashedDataToKeyMap($ParentRows, $MapByColumns);
        foreach ($ParentDataHashKeyMap as $HashedData => $ParentKey) {
            if (isset($GroupedRelatedRows[$HashedData])) {
                $MappedRelatedRows[$ParentKey] = $GroupedRelatedRows[$HashedData];
            } else {
                $MappedRelatedRows[$ParentKey] = [];
            }
        }
    }