public function getValue($key)
    {
        $allKeys = $this->getKeys([$key]);
        if (array_key_exists($key, $allKeys)) {
            return $allKeys[$key]['value'];
        }
        throw new KeyNotFoundException('Requested key not found in your file.');
    }
public function getValue($key)
    {
        $allKeys = $this->getKeys([$key]);
        if (array_key_exists($key, $allKeys)) {
            return $allKeys[$key]['value'];
        }
        throw new KeyNotFoundException('Requested key not found in your file.');
    }
Return the value matching to a given key in the file content

@param  $key

@throws \Jackiedo\DotenvEditor\Exceptions\KeyNotFoundException

@return string