code: def from_config(cls, cfg, *args, **kwargs):
      # backbone
      backbone = create(cfg["backbone"])
      # head
      head = create(cfg["head"])
      # post_process
      post_process = create(cfg["post_process"])
  
      return {
          "backbone": backbone,
          "head": head,
          "post_process": post_process,
      }
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import paddle
  import numpy
  import math
  import cv2
  from ppdet.core.workspace import register, create, serializable
  from .meta_arch import BaseArch
  from ..keypoint_utils import transform_preds
  from ..None import layers
label_desc: Use image node_id 2 for calling the VitPose_TopDown obj's underlying member method code with example usage: obj.from_config(cls, cfg) and returns: dict