class_docstr: Extension to the base class that also provides an inequality check.
class_docstr_tok: ["Extension","to","the","base","class","that","also","provides","an","inequality","check","."]
docstr: Returns an identification string that can be used to uniquely
  identify this instance from others attached to the same experiment.
docstr_tok: ["Returns","an","identification","string","that","can","be","used","to","uniquely","identify","this","instance","from","others","attached","to","the","same","experiment","."]
code: def _unique_id(self) -> str:
      """Returns an identification string that can be used to uniquely
      identify this instance from others attached to the same experiment.
      """
      pass
  
file_path: Ax/ax/utils/common/base.py
imports: from __future__ import annotations
  import abc
  from typing import Optional
  from ax.utils.common.equality import equality_typechecker, object_attribute_dicts_equal
label_desc: Use image node_id 1 for calling the SortableBase obj's underlying member method code with example usage: obj._unique_id() without return types