code: def forward(self, input_pts, cur_iter=None):
      input_pts = self.pos_pe(input_pts, cur_iter)
      return self.nerf(input_pts)
  
imports: import torch
  import torch.nn
  import torch.nn.functional
  import numpy
label_desc: Use image node_id 2 for calling the OffsetNet obj's underlying member method code with example usage: obj.forward(input_pts, cur_iter) and returns: self