code: def forward(self, x):
      x = self.head(x)
      return x
  
imports: import copy
  from functools import partial
  import math
  import warnings
  import torch
  import torch.nn
  from .ops import resize
label_desc: Use image node_id 2 for calling the HeadDepth obj's underlying member method code with example usage: obj.forward(x) and returns: x