class_docstr: Abstract secret.
code: def __str__(self):
      return (
          f"{self.__class__.__name__}(key={self.key},  has"
          f'_value={"True" if self.value else "False"})'
      )
  
imports: import abc
  from typing import Union
label_desc: Use image node_id 3 for calling the AbstractSecret obj's underlying member method code with example usage: obj.__str__() and returns: self, str, self, str, unknown, str