class_docstr: A sentinel to mark a parameter as not explicitly set
class_docstr_tok: ["A","sentinel","to","mark","a","parameter","as","not","explicitly","set"]
code: def __repr__(self):
      return f"default({self.default_value!r})"
  
imports: import ast
  from dataclasses import dataclass
  import operator
label_desc: Use image node_id 1 for calling the _Sentinel obj's underlying member method code with example usage: obj.__repr__() and returns: str, self, str