Pinq\Iterators\Standard\JoinOnEqualityIterator::getInnerValuesIterator PHP Метод

    protected function getInnerValuesIterator($outerKey, $outerValue)
    {
        $outerKeyFunction = $this->outerKeyFunction;
        $groupKey = $outerKeyFunction($outerValue, $outerKey);
        return $this->defaultIterator($this->innerGroups->contains($groupKey) && $groupKey !== null ? $this->innerGroups->get($groupKey) : new EmptyIterator());
    }