Jackalope\ImportExport\ImportExport::unescapeXmlName PHP Method

    public static function unescapeXmlName($name, array $namespaceMap)
    {
        foreach (self::$escaping as $raw => $escaped) {
            // Used a negative look behind to only replace non-escaped escape characters
            $name = preg_replace(sprintf('/(?<!_x005f)%s/', preg_quote($escaped)), $raw, $name);
        }
        // Now replace all escape characters with a regular underscore
        $name = preg_replace('/_x005f_(x[0-9a-zA-F])/', '_\\1', $name);
        return self::cleanNamespace($name, $namespaceMap);
    }

 /**
  * @dataProvider escapeDataProvider
  */
 public function testUnescapeXmlName($expectedOutput, $input)
 {
     $this->assertEquals($expectedOutput, ImportExport::unescapeXmlName($input, array()));
 }