code: def forward(self, x: torch.Tensor) -> torch.Tensor:
      return x * torch.tanh(torch.nn.functional.softplus(x))
  
imports: import math
  import torch
  from allennlp.common import Registrable
label_desc: Use image node_id 1 for calling the MishActivation obj's underlying member method code with example usage: obj.forward(x) and returns: unknown