code: def export_cumsum_1d_reverse() -> None:
      node = onnx.helper.make_node(
          "CumSum", inputs=["x", "axis"], outputs=["y"], reverse=1
      )
      x = np.array([1.0, 2.0, 3.0, 4.0, 5.0]).astype(np.float64)
      axis = np.int32(0)
      y = np.array([15.0, 14.0, 12.0, 9.0, 5.0]).astype(np.float64)
      expect(
          node,
          inputs=[x, axis],
          outputs=[y],
          name="test_cumsum_1d_reverse",
      )
  
file_path: onnx/onnx/backend/test/case/node/cumsum.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 3 for calling the CumSum obj's underlying member method code with example usage: obj.export_cumsum_1d_reverse() without return types