code: def multiple_chunks(self, chunk_size=None):
          
          if not chunk_size:
              chunk_size = self.DEFAULT_CHUNK_SIZE
          return self.size > chunk_size
docs: Returns ``True`` if you can expect multiple chunks.
  
          NB: If a particular file representation is in memory, subclasses should
          always return ``False`` -- there's no good reason to read from memory in
          chunks.