code: def _convert_xywh_to_xywha(self, x):
      return BoxMode.convert(x, BoxMode.XYWH_ABS, BoxMode.XYWHA_ABS)
  
imports: import json
  import math
  import numpy
  import unittest
  import torch
  from detectron2.structures import Boxes, BoxMode, pairwise_ioa, pairwise_iou
  from detectron2.utils.testing import reload_script_model
label_desc: Use image node_id 3 for calling the TestBoxMode obj's underlying member method code with example usage: obj._convert_xywh_to_xywha(x) and returns: BoxMode