code: def export_image_decoder_decode_jpeg2k_rgb() -> None:
      node = onnx.helper.make_node(
          "ImageDecoder",
          inputs=["data"],
          outputs=["output"],
          pixel_format="RGB",
      )
  
      data, output = _generate_test_data(
          "jpeg2000",
          _image_decoder_data.image_decoder_decode_jpeg2k_rgb,
          "RGB",
      )
      expect(
          node,
          inputs=[data],
          outputs=[output],
          name="test_image_decoder_decode_jpeg2k_rgb",
      )
  
file_path: onnx/onnx/backend/test/case/node/image_decoder.py
imports: from __future__ import annotations
  import io
  import numpy
  import onnx
  from onnx.backend.test.case.base import Base
  from onnx.backend.test.case.node import _image_decoder_data, expect
label_desc: Use image node_id 4 for calling the ImageDecoder obj's underlying member method code with example usage: obj.export_image_decoder_decode_jpeg2k_rgb() without return types