public function findModelClassObject($modelClass, $id, $relationContext)
    {
        $keys = $modelClass::primaryKey();
        if (count($keys) > 1) {
            $values = explode(',', $id);
            if (count($keys) === count($values)) {
                return $this->findModelFromCondition(array_combine($keys, $values), $keys, $modelClass, $relationContext);
            }
        } elseif ($id !== null) {
            return $this->findModelFromCondition($id, $keys, $modelClass, $relationContext);
        }

        return false;
    }