private function resolveCache($oid, $property)
    {
        if (isset($this->lazyValueCache[$oid])) {
            if (isset($this->lazyValueCache[$oid][$property])) {
                return $this->lazyValueCache[$oid][$property];
            }

            return;
        }

        $this->lazyValueCache[$oid] = array();
    }