class_docstr: Tuner class to tune your model.
code: def __init__(self, trainer: "pl.Trainer") -> None:
      self._trainer = trainer
  
file_path: pytorch-lightning/src/lightning/pytorch/tuner/tuning.py
imports: from typing import TYPE_CHECKING, Literal, Optional, Union
  import lightning.pytorch
  from lightning.pytorch.callbacks.callback import Callback
  from lightning.pytorch.utilities.exceptions import MisconfigurationException
  from lightning.pytorch.utilities.types import EVAL_DATALOADERS, TRAIN_DATALOADERS
label_desc: Use image node_id 1 to create a new Tuner object  with example: obj = Tuner(trainer)