src/Option/FilenameTrait.php
protected function getFilenameOption(): callable
    {
        if (!isset($this->filename)) {
            $this->filename = new BasicFilename('%s.' . $this->getPacker()->getType());
        }

        return $this->filename;
    }
protected function getFilenameOption(): callable
    {
        if (!isset($this->filename)) {
            $this->filename = new BasicFilename('%s.' . $this->getPacker()->getType());
        }

        return $this->filename;
    }
protected function getFilenameOption ( ) : callable { if ( ! isset ( $ this -> filename ) ) { $ this -> filename = new BasicFilename ( '%s.' . $ this -> getPacker ( ) -> getType ( ) ) ; } return $ this -> filename ; }
Get the filename callable

@return callable
Get the filename callable