Actually these methods are directly called in [eZDFSFileHandler](https://github.com/ezsystems/ezpublish-kernel/blob/master/eZ/Publish/Core/IO/Handler/Legacy/FileResourceProvider/eZDFSFileHandler.php#L27) (bad usage here) and in [eZFSFileHandler](https://github.com/ezsystems/ezpublish-kernel/blob/master/eZ/Publish/Core/IO/Handler/Legacy/FileResourceProvider/eZFSFileHandler.php)