class_docstr: Paper Section 3.4, last paragraph notice that BERT used the GELU instead of RELU
code: def forward(self, x):
      return (
          0.5
          * x
          * (
              1
              + th.tanh(
                  math.sqrt(2 / math.pi) * (x + 0.044715 * th.pow(x, 3))
              )
          )
      )
  
imports: import math
  from collections import OrderedDict
  import torch
  import numpy
  from torch import nn
  from typing import Union
  from .utils import to_torch_dtype
label_desc: Use image node_id 1 for calling the GELU_TANH obj's underlying member method code with example usage: obj.forward(x) and returns: unknown