public static function extensionIdentifier(string $extensionKey): string {
    $extensionIdentifier = GeneralUtility::underscoredToUpperCamelCase($extensionKey);
    $extensionIdentifier = mb_strtolower($extensionIdentifier);

    return $extensionIdentifier;
  }
public static function extensionIdentifier(string $extensionKey): string {
    $extensionIdentifier = GeneralUtility::underscoredToUpperCamelCase($extensionKey);
    $extensionIdentifier = mb_strtolower($extensionIdentifier);

    return $extensionIdentifier;
  }
public static function extensionIdentifier ( string $ extensionKey ) : string { $ extensionIdentifier = GeneralUtility :: underscoredToUpperCamelCase ( $ extensionKey ) ; $ extensionIdentifier = mb_strtolower ( $ extensionIdentifier ) ; return $ extensionIdentifier ; }
Gets an extension identifier from an extension key.

@param string $extensionKey The extension key
@return string The extension identifier
Gets an extension identifier from an extension key .