GraphQL\Type\Definition\EnumType::getNameLookup PHP Method

    private function getNameLookup()
    {
        if (!$this->nameLookup) {
            $lookup = new \ArrayObject();
            foreach ($this->getValues() as $value) {
                $lookup[$value->name] = $value;
            }
            $this->nameLookup = $lookup;
        }
        return $this->nameLookup;
    }