public static function staticToStatic(string $sourceName, string $targetName): void
  {
    $source      = file_get_contents($sourceName);
    $sourceClass = basename($sourceName, '.php');
    $targetClass = basename($targetName, '.php');

    $source = NonStatic::nonStatic($source, $sourceClass, $targetClass);

    file_put_contents($targetName, $source);
  }