class_docstr: Secret interface.
docstr: The secret's string identifier.
docstr_tok: ["The","secret","'s","string","identifier","."]
code: def key(self) -> str:
      """
      The secret's string identifier.
      """
      pass
  
imports: import abc
  from typing import Union
label_desc: Use image node_id 1 for calling the ISecret obj's underlying member method code with example usage: obj.key() without return types