code: def forward(self, x, padding_mask):
      return self.positions
  
imports: import torch
  import torch.nn
  import torch.nn.functional
  import numpy
  from dataclasses import dataclass
  from fairseq.modules import LayerNorm, SamePad, SamePad2d, TransposeLast
label_desc: Use image node_id 2 for calling the FixedPositionalEncoder obj's underlying member method code with example usage: obj.forward(x, padding_mask) and returns: self