code: def postprocess_item(self, item: np_dict_type) -> np_dict_type:
      inp = item[INPUT_KEY].transpose([2, 0, 1])
      inp = np.ascontiguousarray(inp)
      item[INPUT_KEY] = inp
      return item
  
imports: import numpy
  from cftool.types import np_dict_type
  from ....schema import IRuntimeDataBlock
  from ....constants import INPUT_KEY
label_desc: Use image node_id 1 for calling the HWCToCHWBlock obj's underlying member method code with example usage: obj.postprocess_item(item) and returns: item