class_docstr: Module to add position embedding to input features
  Args:
      dim (int): dimension
      spatial_shape (int): spatial shape
code: def forward(self, x):
      return x + self.pos_embed
  
imports: from torch import nn
  import torch
  from typing import Sequence
label_desc: Use image node_id 2 for calling the AddPositionEmb obj's underlying member method code with example usage: obj.forward(x) and returns: unknown