code: def start(self, action_name: str) -> None:
      if self.profiler is None:
          # close profiler if it is already opened. might happen if 2 profilers
          # are created and the first one did not call `describe`
          if torch.autograd._profiler_enabled():
              torch.autograd._disable_profiler()
  
          if self._schedule is not None:
              self._schedule.setup(action_name)
  
          self._create_profilers()
  
          profiler = self.profiler.__enter__()
          if profiler is not None:
              self.profiler = profiler
  
          if self._parent_profiler is not None:
              self._parent_profiler.__enter__()
  
      if (
          self._lightning_module is not None
          and self._register is None
          and self._record_module_names
      ):
          self._register = RegisterRecordFunction(
              self._lightning_module
          )
          self._register.__enter__()
  
      if (
          self.profiler is not None
          and action_name not in self._recording_map
      ):
          # Add [pl][profile] in name for pytorch profiler to recognize
          recording = record_function("[pl][profile]" + action_name)
          recording.__enter__()
          self._recording_map[action_name] = recording
  
imports: import inspect
  import logging
  import os
  from functools import lru_cache, partial
  from pathlib import Path
  from typing import TYPE_CHECKING, Any, Callable, ContextManager, Dict, List, Optional, Type, Union
  import torch
  from torch import Tensor, nn
  from torch.autograd.profiler import EventList, record_function
  from torch.profiler import ProfilerAction, ProfilerActivity, tensorboard_trace_handler
  from torch.utils.hooks import RemovableHandle
  from typing_extensions import override
  from lightning.fabric.accelerators.cuda import is_cuda_available
  from lightning.pytorch.profilers.profiler import Profiler
  from lightning.pytorch.utilities.exceptions import MisconfigurationException
  from lightning.pytorch.utilities.rank_zero import WarningCache, rank_zero_warn
label_desc: Use image node_id 7 for calling the PyTorchProfiler obj's underlying member method code with example usage: obj.start(action_name) without return types