code: def __len__(self):
      # type: () -> int
      return self._length
  
file_path: wandb/wandb/vendor/promise-2.3.0/wandb_promise/promise_list.py
imports: from functools import partial
label_desc: Use image node_id 2 for calling the PromiseList obj's underlying member method code with example usage: obj.__len__() and returns: self