code: def swish(x):
      return x * torch.sigmoid(x)
  
imports: import torch
  import torch.nn
  import torch.nn.functional
  from basicsr.utils import get_root_logger
  from basicsr.utils.registry import ARCH_REGISTRY
label_desc: Use image node_id 2 for calling a global function with example usage: swish(x) and returns: unknown