class_docstr: Base Event class abstraction for multi backends Event to herit from
class_docstr_tok: ["Base","Event","class","abstraction","for","multi","backends","Event","to","herit","from"]
code: def synchronize(self):
      raise NotImplementedError()
  
file_path: pytorch/torch/_streambase.py
imports: from abc import ABC, abstractmethod
label_desc: Use image node_id 3 for calling the _EventBase obj's underlying member method code with example usage: obj.synchronize() without return types