class_docstr: Applies the linear activation function, i.e. forwarding input directly to output.
code: def forward(self, input: Tensor) -> Tensor:
      return input
  
imports: import math
  from collections import OrderedDict
  import torch
  from packaging import version
  from torch import Tensor, nn
  from .utils import logging
label_desc: Use image node_id 1 for calling the LinearActivation obj's underlying member method code with example usage: obj.forward(input) and returns: input