code: def tlbr_to_tlwh(tlbr):
      ret = np.asarray(tlbr).copy()
      ret[2:] -= ret[:2]
      return ret
  
imports: import numpy
  from collections import defaultdict
  from collections import deque, OrderedDict
  from ..matching import jde_matching
  from ppdet.core.workspace import register, serializable
  import warnings
label_desc: Use image node_id 14 for calling the STrack obj's underlying member method code with example usage: obj.tlbr_to_tlwh(tlbr) and returns: ret