protected function initializeAssetsDir()
    {
        $this->filesystem->ensureDirectoryExists($this->assets_dir);
        $this->assets_dir = realpath($this->assets_dir);
        return $this;
    }
protected function initializeAssetsDir()
    {
        $this->filesystem->ensureDirectoryExists($this->assets_dir);
        $this->assets_dir = realpath($this->assets_dir);
        return $this;
    }
protected function initializeAssetsDir ( ) { $ this -> filesystem -> ensureDirectoryExists ( $ this -> assets_dir ) ; $ this -> assets_dir = realpath ( $ this -> assets_dir ) ; return $ this ; }
Create the `assets_dir` if needed

@return self
Create the assets_dir if needed