class_docstr: Just a batchnorm.
docstr: Forward function.
docstr_tok: ["Forward","function","."]
code: def forward(self, inputs, img_metas=None, **kwargs):
      """Forward function."""
      output = self._forward_feature(
          inputs, img_metas=img_metas, **kwargs
      )
      output = self.depth_pred(output)
      return output
  
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 4 for calling the BNHead obj's underlying member method code with example usage: obj.forward(inputs, img_metas) and returns: output