code: def save(self, url, storage_options=None):
          
          from dask.bytes import open_files
          with open_files([url], **(storage_options or {}), mode='wt')[0] as f:
              f.write(self.serialize())
docs: Output this catalog to a file as YAML
  
          Parameters
          ----------
          url : str
              Location to save to, perhaps remote
          storage_options : dict
              Extra arguments for the file-system