code: def nonlinearity(x):
      # swish
      return x * torch.sigmoid(x)
  
imports: import logging
  import math
  from typing import Any, Callable, Optional
  import numpy
  import torch
  import torch.nn
  from einops import rearrange
  from packaging import version
  from ...modules.attention import LinearAttention, MemoryEfficientCrossAttention
label_desc: Use image node_id 2 for calling a global function with example usage: nonlinearity(x) and returns: unknown