code: def add(
      self,
      single_stage: bool = False,
      fname: Optional[str] = None,
      validate: bool = True,
      force: bool = False,
      update_lock: bool = False,
      **stage_data,
  ):
      stage = self.create(
          single_stage=single_stage,
          fname=fname,
          validate=validate,
          force=force,
          **stage_data,
      )
      stage.dump(update_lock=update_lock)
      try:
          stage.ignore_outs()
      except FileNotFoundError as exc:
          ui.warn(
              f"Could not create .gitignore entry in {exc.filename}."
              " DVC will attempt to create .gitignore entry again when"
              " the stage is run."
          )
  
      return stage
  
imports: import fnmatch
  import typing
  from contextlib import suppress
  from functools import wraps
  from typing import Iterable, List, NamedTuple, Optional, Set, Tuple, Union
  from dvc.exceptions import NoOutputOrStageError, OutputDuplicationError, OutputNotFoundError
  from dvc.log import logger
  from dvc.repo import lock_repo
  from dvc.ui import ui
  from dvc.utils import as_posix, parse_target
label_desc: Use image node_id 3 for calling the StageLoad obj's underlying member method code with example usage: obj.add(single_stage, fname, validate, force, update_lock) and returns: stage