code: def export_example() -> None:
      node = onnx.helper.make_node(
          "SpaceToDepth",
          inputs=["x"],
          outputs=["y"],
          blocksize=2,
      )
  
      # (1, 1, 4, 6) input tensor
      x = np.array(
          [
              [
                  [
                      [0, 6, 1, 7, 2, 8],
                      [12, 18, 13, 19, 14, 20],
                      [3, 9, 4, 10, 5, 11],
                      [15, 21, 16, 22, 17, 23],
                  ]
              ]
          ]
      ).astype(np.float32)
  
      # (1, 4, 2, 3) output tensor
      y = np.array(
          [
              [
                  [[0, 1, 2], [3, 4, 5]],
                  [[6, 7, 8], [9, 10, 11]],
                  [[12, 13, 14], [15, 16, 17]],
                  [[18, 19, 20], [21, 22, 23]],
              ]
          ]
      ).astype(np.float32)
      expect(
          node,
          inputs=[x],
          outputs=[y],
          name="test_spacetodepth_example",
      )
  
file_path: onnx/onnx/backend/test/case/node/spacetodepth.py
imports: import numpy
  import onnx
  from onnx.backend.test.case.base import Base
  from onnx.backend.test.case.node import expect
label_desc: Use image node_id 2 for calling the SpaceToDepth obj's underlying member method code with example usage: obj.export_example() without return types