code: def fetch(self, obj, include_meta=False, chunk_size=None, size=None,
              extra_info=None):
          
          return self.object_manager.fetch(obj, include_meta=include_meta,
                  chunk_size=chunk_size, size=size)
docs: Fetches the object from storage.
  
          If 'include_meta' is False, only the bytes representing the
          stored object are returned.
  
          Note: if 'chunk_size' is defined, you must fully read the object's
          contents before making another request.
  
          If 'size' is specified, only the first 'size' bytes of the object will
          be returned. If the object if smaller than 'size', the entire object is
          returned.
  
          When 'include_meta' is True, what is returned from this method is a
          2-tuple:
              Element 0: a dictionary containing metadata about the file.
              Element 1: a stream of bytes representing the object's contents.
  
          The 'extra_info' parameter is included for backwards compatibility. It
          is no longer used at all, and will not be modified with swiftclient
          info, since swiftclient is not used any more.