public function getVariable($callId, $variableIdentifier)
    {
        $rawVariable = $this->getDbStorage()->getVariable($callId, $variableIdentifier);

        if ($this->canFileBeRestored($rawVariable[0]->variable)) {
            $rawVariable[0]->variable = $this->restoreFile($rawVariable[0]->variable);
        }

        return $rawVariable;
    }