code: def forward(self, x: torch.Tensor) -> torch.Tensor:
      # input shape: batch, seq, dim
      out, _ = self.rnn(x)
      out = self.proj(out)
      return out
  
imports: import math
  from typing import List, Optional, Tuple
  import torch
  import torch.nn
  import torch.nn.functional
label_desc: Use image node_id 2 for calling the SingleRNN obj's underlying member method code with example usage: obj.forward(x) and returns: out