code: def forward(self, x):
      return F.softplus(x) - self.shift
  
imports: from math import pi
  import torch
  import torch.nn.functional
  from torch.nn import Embedding, Sequential, Linear
  from torch_scatter import scatter
  from torch_geometric.nn import radius_graph
label_desc: Use image node_id 2 for calling the ShiftedSoftplus obj's underlying member method code with example usage: obj.forward(x) and returns: unknown