class_docstr: Common base class for Command exceptions.
code: def __repr__(self) -> str:
      if self._exception:
          return repr(self._exception)
      return repr(self)
  
imports: from typing import Any, Optional
  from flask_babel import lazy_gettext
  from marshmallow import ValidationError
  from superset.exceptions import SupersetException
label_desc: Use image node_id 1 for calling the CommandException obj's underlying member method code with example usage: obj.__repr__() and returns: repr, repr