class_docstr: The DummySequenceDescriptor is an empty object that allows us to perform schedulability
  checks before formally tracking a sequence.
class_docstr_tok: ["The","DummySequenceDescriptor","is","an","empty","object","that","allows","us","to","perform","schedulability","checks","before","formally","tracking","a","sequence","."]
code: def seen_tokens(self) -> int:
      return self._seen_tokens
  
imports: from typing import List, Tuple, Union
  import torch
label_desc: Use image node_id 2 for calling the PlaceholderSequenceDescriptor obj's underlying member method code with example usage: obj.seen_tokens() and returns: self