code: def conv1x1(
      in_planes: int, out_planes: int, stride: int = 1
  ) -> nn.Conv2d:
      """1x1 convolution."""
      return nn.Conv2d(
          in_planes,
          out_planes,
          kernel_size=1,
          stride=stride,
          bias=False,
      )
  
imports: from functools import partial
  from typing import Any, Callable, List, Optional, Type, Union
  import torch
  import torch.nn
  from torch import Tensor
  from torch.hub import load_state_dict_from_url
  from flash.core.registry import FlashRegistry
  from flash.core.utilities.imports import _TIMM_AVAILABLE
  from flash.core.utilities.url_error import catch_url_error
label_desc: Use image node_id 2 for calling a global function with example usage: conv1x1(in_planes, out_planes, stride) and returns: nn