src/Adapter/FileAdapter/ValueTrait.php
protected function getValue($key)
    {
        $getResult = $this->getClient()->get($key);
        if ($getResult === false) {
            throw new KeyNotFoundException($key);
        }

        return $getResult;
    }
protected function getValue($key)
    {
        $getResult = $this->getClient()->get($key);
        if ($getResult === false) {
            throw new KeyNotFoundException($key);
        }

        return $getResult;
    }
@param string $key

@return string
@throws KeyNotFoundException
@throws \Exception