code: def swish(x):
      return x * torch.sigmoid(x)
  
imports: from torch_geometric.nn import inits, MessagePassing
  from torch_geometric.nn import radius_graph
  from .features import d_angle_emb, d_theta_phi_emb
  from torch_scatter import scatter
  from torch_sparse import matmul
  import torch
  from torch import nn
  from torch.nn import Embedding
  import torch.nn.functional
  import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: swish(x) and returns: unknown