class_docstr: ### Swish actiavation function
  
  $$x \cdot \sigma(x)$$
class_docstr_tok: ["#","#","#","Swish","actiavation","function","$","$","x","\\cdot","\\sigma","(","x",")","$","$"]
code: def forward(self, x):
      return x * torch.sigmoid(x)
  
imports: import math
  from typing import Optional, Tuple, Union, List
  import torch
  from torch import nn
  from labml_helpers.module import Module
label_desc: Use image node_id 1 for calling the Swish obj's underlying member method code with example usage: obj.forward(x) and returns: unknown